ANALYSIS OF EXTRUSION PROBLEMS WITH FLOW SIMULATION
|
|
- Elmer Quinn
- 6 years ago
- Views:
Transcription
1 Compuplast International Inc ANALYSIS OF EXTRUSION PROBLEMS WITH FLOW SIMULATION Vijay Kudchadkar Compuplast International Inc.
2 Objectives Demonstrate the application of CAE/CFD/Simulation towards extrusion Show how simulation can be used to troubleshoot an extrusion process Explain certain observations or phenomena with the aid of simulation. All simulations performed using the Compuplast Virtual Extrusion Laboratory (VEL) Suite of CAE Tools for Extrusion
3 Problem: Particles in Film Sample In this system, periodic showers of particles were observed in the film sample.
4 Photo of Extruder Screw The screw used to produce the film had a noticeable discoloration in the feed and compression region.
5 Comprehensive Tests with the Macro Glass Window Extruder Song, Perdikoulias and Planeta, ANTEC 2000
6 Comprehensive Tests with the Glass Window Extruder LDPE 50 W2 & W3, ~ 17D
7 Solid Bed Break-Up Improper screw design results in solid bed break-up and there is no mixer to compensate
8 Inhomogeneous Melt Flow Direction Gray areas represent material that has not been properly mixed or homogenized.
9 Define: Solid Bed Ratio Solid Bed Melt Pool Flow Direction Channel Width Ratio of Solid bed width to Channel Width Indication of melting capability of the screw Solid Bed Ratio = SB Width Channel Width
10 Analysis of Solid Bed Ratio Simulation indicates that the Solid bed ratio does not reduce gradually as preferred but actually increases near center of screw.
11 Solution: Modify Process Conditions, Change Material or Screw Design to achieve better melting performance Good melting
12 Problem: Polymer Degradation Screen Changer Flat Die Manifold
13 Degradation on SCREW / BARREL / SCREENCHANGER 90 mm Diameter 250 kg/hr 190 C Shear Rate = 1.3/s Shear Stress = 5 kpa
14 The role of wall shear stress = Velocity = 0 = max Shear Stress High enough shear stress cleans the wall by scrubbing What is high enough? LDPE PVC 30 kpa 35 kpa HDPE LLDPE 30 kpa 30 kpa
15 Degradation SCREW / BARREL / SCREENCHANGER
16 Original Shape Shear stresses inside the flow domain
17 New Shape Shear stresses inside the flow domain
18 Degradation on SCREW / BARREL / SCREENCHANGER (Improved design)
19 Problem: Degradation and Damage in Flat Die Manifold The outer edges of the manifold exhibit degradation and even corrosion damage.
20 Simulation Results: Shear Stress Low shear stress at outer edge of manifold results in insufficient purge characteristics. Polymer exhibits long residence time and ultimately degrades. Some polymer degradation results in corrosive byproducts.
21 Polymer Degradation Solution Ensure adequate shear stress in all flow channels. Proper Channel Design Proper Operation Conditions
22 Problem: Periodic Lines in Tubular Film Bubble Lines appear as a visual defect in film produced on a spiral mandrel type die.
23 Potential Problem With some Spiral Mandrel type dies, a flow defect is sometimes observed that appears like a weld line in the product. It may also be observed in the product as a very localized thin section that repeats around the circumference of the die as many times as there are spirals.
24 The Spiral Mandrel Flow Field
25 Spiral Mandrel Flow Video
26 3D FEM - Pressure Drop
27 3D FEM Velocity
28 3D FEM Velocity (2 of 3 sections)
29 3D FEM - Shear Stress Low Shear Stress
30 3D Flow Analysis Particle Path Line Seeds Velocity contours for 2/3 of the die and path line seed locations
31 3D FEM - Particle Path
32 3D FEM - Particle Paths Particle Path From Next Spiral
33 Particle Path Lines Particle path lines showing "back flow"
34 Particle Paths Avoid Low Shear Stress
35 The Back-Flow Essentially Forms Weld Line
36 Problem: Lines in Flat Film
37 Poorly designed flat spiral distributor
38 Poorly designed flat spiral distributor
39 Poorly designed flat spiral distributor
40 Spiral Back-Flow Solution Design spiral distribution system to control the leakage flow from the spirals and ensure adequate velocity (and shear stress) along the entire channel.
41 Problem: Wave pattern in feed-block coextrusion Photograph of film sample exhibiting "wave" instability
42 Problem Definition
43 Problem Definition In a 3 layer coextrusion, the thin center layer exhibits an interfacial instability that is observed on the extruded film. Why? How can it be removed?
44 Feed-block system
45 Velocity profile on the original feedblock V max = 113 mm/s V max = 14.6 mm/s V max = 64.6 mm/s Central layer acceleration 64.6/14.6 = 4.4
46 Second material flow passage original design Area of high acceleration
47 Elongational viscosity dependence Log e LDPE HDPE, LLDPE 10 A material with increasing elongational viscosity Log does e not want to be accelerated. It generates a high resistance against the acceleration. This resistance influencesthe flow of neighbor materials and thus fluctuations are generated.
48 Deformation rate of the central layer 4.5 1/s /s
49 Velocity profile on modified feedblock V max = 82 mm/s Better balanced velocities V max = 26 mm/s V max = 64.6 mm/s Central layer acceleration 64.6/26 = 2.5
50 Second material flow passage modified design Lower acceleration
51 Deformation rate of the central layer 2.5 1/s /s
52 Explanation and Solution It was observed that the flow balancing in the lamella region helped to improved the production stability (interfacial instability disappeared) The flow balancing reduced the elongational rate of the center layer and the interface distortion was minimized.
53 Concluding Remarks Process simulation provides more information for correlation between process conditions and production problems. Simulation gives new insight into problems, which can lead to faster and more precise solutions.
54 THANK YOU!!! Questions? Vijay Kudchadkar
The Effect of Material Selection in Feed-Block Coextrusion of a Three Layer Film
The Effect of Material Selection in Feed-Block Coextrusion of a Three Layer Film Jiri Vlcek 1, Walter Kopytko 2, Martin Zatloukal 2 and Jiri Svabik 1 1. Compuplast International Inc., Zlin, Czech Republic
More informationAll rights reserved, 2011, Century Extrusion. Why simulation? Limited availability and cost of API s
Evonik Industries 4 th International Symposium on Pharmaceutical Melt Extrusion Understanding Melt Extrusion Processes by Simulation Presented by Adam Dreiblatt Director, Process Technology All rights
More informationCOMPUTATIONAL ANALYSIS AND DESIGN OF SINGLE SCREW EXTRUDERS HAVING SCREWS OF COMPLEX GEOMETRY WITH MIXING ELEMENTS
COMPUTATIONAL ANALYSIS AND DESIGN OF SINGLE SCREW EXTRUDERS HAVING SCREWS OF COMPLEX GEOMETRY WITH MIXING ELEMENTS John Vlachopoulos McMaster University Nick Polychronopoulos * Polydynamics, Inc. Shinichiro
More information2009 Best Paper Understanding and Quantification of Die Drool Phenomenon During Polypropylene Extrusion Process
2009 Best Paper Understanding and Quantification of Die Drool Phenomenon During Polypropylene Extrusion Process Print (10)» 2010 Best Paper An Engineering Approach to the Correction of Rotational Flow
More informationCOMPUTATIONAL ANALYSIS AND DESIGN OF SINGLE SCREW EXTRUDERS HAVING SCREWS OF COMPLEX GEOMETRY WITH MIXING ELEMENTS
COMPUTATIONAL ANALYSIS AND DESIGN OF SINGLE SCREW EXTRUDERS HAVING SCREWS OF COMPLEX GEOMETRY WITH MIXING ELEMENTS John Vlachopoulos McMaster University Nick Polychronopoulos * Polydynamics, Inc. Shinichiro
More informationEFFECT OF TYPICAL MELT TEMPERATURE NON-UNIFORMITY ON FLOW DISTRIBUTION IN FLAT DIES
EFFEC OF YPICAL MEL EMPERAURE NON-UNIFORMIY ON FLOW DISRIBUION IN FLA DIES Olivier Catherine, Cloeren Incorporated, Orange, X Abstract In this study, the influence of non-uniform incoming melt temperature
More informationInvestigation of Polymer Long Chain Branching on Film Blowing Process Stability by using Variational Principle
Investigation of Polymer Long Chain Branching on Film Blowing Process Stability by using Variational Principle ROMAN KOLARIK a,b and MARTIN ZATLOUKAL a,b a Centre of Polymer Systems, University Institute
More informationA NEW DISPERSIVE AND DISTRIBUTIVE STATIC MIXER FOR THE COMPOUNDING OF HIGHLY VISCOUS MATERIALS
A NEW DISPERSIVE AND DISTRIBUTIVE STATIC MIXER FOR THE COMPOUNDING OF HIGHLY VISCOUS MATERIALS Paul Gramann and Bruce Davis, The Madison Group: PPRC. Tim Osswald, University of Wisconsin-Madison Chris
More informationDetermining the Processability of Multilayer Coextruded Structures
Determining the Processability of Multilayer Coextruded Structures Joseph Dooley The Dow Chemical Company, Midland, MI ABSTRACT Multilayer coextrusion is a process in which two or more polymers are extruded
More informationMultilayer Rheology Effects in Coextruded Structure Design
2008 Best Paper Multilayer Rheology Effects in Coextruded Structure Design Print (10)» Best Papers» 2009 Best Paper Understanding and Quantification of Die Drool Phenomenon During Polypropylene Extrusion
More informationFinal Polymer Processing
030319 Final Polymer Processing I) Blow molding is used to produce plastic bottles and a blow molding machine was seen during the Equistar tour. In blow molding a tubular parison is produced by extrusion
More informationA NEW DISPERSIVE MIXER FOR SINGLE SCREW EXTRUDERS
A NEW DISPERSIVE MIXER FOR SINGLE SCREW EXTRUDERS Chris Rauwendaal, Rauwendaal Extrusion Engineering, Inc. Tim Osswald, University of Wisconsin, Madison Paul Gramann and Bruce Davis, The Madison Group
More informationInjection Molding. Figure 1: Principles of injection molding. Injection molding cycle: part solidifies. Open Mold Eject Part Close Mold
Injection Molding Figure 1: Principles of injection molding. Injection molding cycle: Extruder Pressure Extrude Mold Inject Pack Solidify Open Mold Eject Part Close Mold gate solidifies part solidifies
More informationNEW DISPERSIVE MIXERS FOR SINGLE SCREW EXTRUDERS
NEW DISPERSIVE MIXERS FOR SINGLE SCREW EXTRUDERS Chris Rauwendaal, Rauwendaal Extrusion Engineering, Inc. Tim Osswald, University of Wisconsin, Madison Paul Gramann and Bruce Davis, The Madison Group ABSTRACT
More informationMorphology Evolution in PS/LDPE Blends in a Twin Screw Extruder: Effects of Compatibilizer
Korean J. Chem. Eng., 18(1), 33-39 (2001) Morphology Evolution in PS/LDPE Blends in a Twin Screw Extruder: Effects of Compatibilizer Do Young Moon*, Moo Hyun Kwon and O Ok Park *Chemical Division R&D Center,
More informationTHE 3D VISCOELASTIC SIMULATION OF MULTI-LAYER FLOW INSIDE FILM AND SHEET EXTRUSION DIES
THE 3D VISCOELASTIC SIMULATION OF MULTI-LAYER FLOW INSIDE FILM AND SHEET EXTRUSION DIES Kazuya Yokomizo 1, Makoto Iwamura 2 and Hideki Tomiyama 1 1 The Japan Steel Works, LTD., Hiroshima Research Laboratory,
More informationAN ANALYSIS OF THE EFFECT OF ELONGATIONAL VISCOSITY ONTHEFLOWINAFLATDIE
AN ANALYSIS OF THE EFFECT OF ELONGATIONAL VISCOSITY ONTHEFLOWINAFLATDIE Y. Sun and M. Gupta Mechanical Engineering-Engineering Mechanics Department Michigan Technological University Houghton, MI 49931
More informationApplication of Analytical Technique to Resolving the Flow Dynamics in Self-wiping Co-rotating Twin Screw Extruders
Proceedings of the International Conference on New Trends in Transport Phenomena Ottawa, Ontario, Canada, May 1-2 2014 Paper No. 57 Application of Analytical Technique to Resolving the Flow Dynamics in
More informationSIMULATION OF POLYMERIC FLOW IN A TWIN-SCREW EXTRUDER: AN ANALYSIS OF ELONGATIONAL VISCOSITY EFFECTS
SIMULATION OF POLYMERIC FLOW IN A TWIN-SCREW EXTRUDER: AN ANALYSIS OF ELONGATIONAL VISCOSITY EFFECTS A. Shah and M. Gupta Mechanical Engineering-Engineering Mechanics Department Michigan Technological
More informationSIMULATIVE EVALUATION OF THE TEMPERATURE INFLUENCE ON DIFFERENT TYPES OF PRE-DISTRIBUTORS IN SPIRAL MANDREL DIES
SIMULATIVE EVALUATION OF THE TEMPERATURE INFLUENCE ON DIFFERENT TYPES OF PRE-DISTRIBUTORS IN SPIRAL MANDREL DIES Christian Hopmann and Nafi Yesildag, Institute of Plastics Processing (IKV) at RWTH Aachen
More informationModeling of Anisotropic Polymers during Extrusion
Modeling of Anisotropic Polymers during Extrusion Modified on Friday, 01 May 2015 10:38 PM by mpieler Categorized as: Paper of the Month Modeling of Anisotropic Polymers during Extrusion Arash Ahmadzadegan,
More informationIntroduction to the numerical Simulation of Twin Screw extruders
Introduction to the numerical Simulation of Twin Screw extruders Ludovic 2D Twin-Screw numerical Simulation XimeX 3D General Purpose Numerical Simulation Numerical Simulation Why? Simulate the Equipment
More informationExperimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies
SCREW EXTRUSION R. Valette 1 *, P. Laure 2, Y. Demay 1, J.-F. Agassant 1 1 Centre de Mise Forme des MatØriaux, Ecole Nationale des Mines de Paris, Sophia Antipolis, France 2 Institut Non-LinØaire de Nice,
More informationMeasuring the rheology of thermoplastic polymer melts
Measuring the rheology of thermoplastic polymer melts Using rotational and capillary rheometry to characterize polymer melts RHEOLOGY AND VISCOSITY Introduction Rheology is the science of studying the
More informationDEPARTMENT OF ELECTRICAL ENGINEERING DIT UNIVERSITY HIGH VOLTAGE ENGINEERING
UNIT 1: BREAKDOWN IN SOLIDS 1.) Introduction: The solid dielectric materials are used in all kinds of electrical apparatus and devices to insulate current carrying part from another when they operate at
More informationMoldflow Report Beaumont Logo. Performed by: Beaumont Technologies Requested by: Customer
Moldflow Report Beaumont Logo Performed by: Beaumont Technologies Requested by: Customer Objective To analyze the BTI Logo part in order to determine an optimal gate location. To thoroughly evaluate the
More informationMODELING THREE-DIMENSIONAL NON-NEWTONIAN FLOWS IN SINGLE- SCREW EXTRUDERS
MODELING THREE-DIMENSIONAL NON-NEWTONIAN FLOWS IN SINGLE- SCREW EXTRUDERS Christian Marschik Wolfgang Roland Bernhard Löw-Baselli Jürgen Miethlinger Johannes Kepler University Institute of Polymer Extrusion
More informationFlow Induced Molecular Weight Fractionation during Capillary Flow of Linear Polymer Melt
Flow Induced Molecular Weight Fractionation during Capillary Flow of Linear Polymer Melt JAN MUSIL a,b and MARTIN ZATLOUKAL a,b a Centre of Polymer Systems, University Institute Tomas Bata University in
More informationPerformance evaluation of different model mixers by numerical simulation
Journal of Food Engineering 71 (2005) 295 303 www.elsevier.com/locate/jfoodeng Performance evaluation of different model mixers by numerical simulation Chenxu Yu, Sundaram Gunasekaran * Food and Bioprocess
More informationScholar: M. Azad Emin. Supervisor: Prof. Dr. Ing. Heike P. Schuchmann
Final report of project 2819: Emulsification of triglyceride phases in cereal matrices via high-speed extrusion process for the stabilization of lipophilic bioactive components in starch-based products
More informationRheology Of Reinforced Polypropylene Melt Flow
Rheology Of Reinforced Polypropylene Melt Flow Dr. Sadek Rejeibi, Dr.Abdelati Elalem, Dr.Omer Algydi Department of Chemical Engineering, Faculty of Engineering -Tripoli University Abstract: Different techniques
More informationRHEOLOGY AS A POWERFULL TOOL FOR SCIENTIFIC AS WELL INDUSTRIAL CHARACTERISATION OF NEW MATERIALS BASED ON POLYMER-CLAY NANOCOMPOSITES.
RHEOLOGY AS A POWERFULL TOOL FOR SCIENTIFIC AS WELL INDUSTRIAL CHARACTERISATION OF NEW MATERIALS BASED ON POLYMER-CLAY NANOCOMPOSITES Milan Kracalik Johannes Kepler University Linz, Institute of Polymer
More informationUSE OF RHEOLOGY AS A DEVELOPING AND TROUBLESHOOTING TOOL FOR PSA APPLICATIONS.
USE OF RHEOLOGY AS A DEVELOPING AND TROUBLESHOOTING TOOL FOR PSA APPLICATIONS. Michael DeFrancisis, Applications Engineer, Henkel, Bridgewater, NJ Yayun Liu, Senior Development Scientist, Henkel, Bridgewater,
More informationANALYSIS ON PLANAR ENTRY CONVERGING FLOW OF POLYMER MELTS
Journal of Materials Science and Engineering with Advanced Technology Volume 2, Number 2, 2010, Pages 217-233 ANALYSIS ON PLANAR ENTRY CONVERGING FLOW OF POLYMER MELTS College of Industrial Equipment and
More informationCharacterization of extrusion flow using particle image velocimetry
express Polymer Letters Vol.3, No.9 (2009) 569 578 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.71 Characterization of extrusion flow using particle image velocimetry
More informationDESIGN OF DISPERSIVE MIXING DEVICES
DESIGN OF DISPERSIVE MIXING DEVICES Chris Rauwendaal, Rauwendaal Extrusion Engineering, Inc. Tim Osswald, University of Wisconsin, Madison Paul Gramann and Bruce Davis, The Madison Group ABSTRACT Mixing
More informationMATERIALS AND METHODS
Monitoring of Rheological Indicators of LDPE Per-Åke Clevenhag and Claes Oveby Tetra Pak Carton Ambient AB ABSTRACT LDPE,s from high-pressure autoclave reactors for extrusion coating with Melt Flow Rates
More informationOn Relationship between PVT and Rheological Measurements of Polymer Melts
ANNUAL TRANSACTIONS OF THE NORDIC RHEOLOGY SOCIETY, VOL. 3, 2005 On Relationship between PVT and Rheological Measurements of Polymer Melts Tomas Sedlacek, Peter Filip 2, Peter Saha Polymer Centre, Faculty
More information1. Starting of a project and entering of basic initial data.
PROGRAM VISIMIX TURBULENT SV. Example 1. Contents. 1. Starting of a project and entering of basic initial data. 1.1. Opening a Project. 1.2. Entering dimensions of the tank. 1.3. Entering baffles. 1.4.
More informationNanocomposites: A Single Screw Mixing Study of Nanoclay-filled Polypropylene
Nanocomposites: A Single Screw Mixing Study of Nanoclay-filled Polypropylene By Jae Whan Cho, Jason Logsdon, Scott Omachinski, Guoqiang Qian, Tie Lan - Nanocor, Inc. Timothy W. Womer and Walter S. Smith
More informationThe Stress Variations of Granular Samples in Direct Shear Tests using Discrete Element Method
The Stress Variations of Granular Samples in Direct Shear Tests using Discrete Element Method Hoang Khanh Le 1), *Wen-Chao Huang 2), Yi-De Zeng 3), Jheng-Yu Hsieh 4) and Kun-Che Li 5) 1), 2), 3), 4), 5)
More informationSupplementary table I. Table of contact angles of the different solutions on the surfaces used here. Supplementary Notes
1 Supplementary Figure 1. Sketch of the experimental setup (not to scale) : it consists of a thin mylar sheet (0, 02 4 3cm 3 ) held fixed vertically. The spacing y 0 between the glass plate and the upper
More informationHomogeneity of multilayers produced with a Static Mixer
Homogeneity of multilayers produced with a Static Mixer J.C.vanderHoeven,R. Wimberger-Friedl,H.E.H.Meijer Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands DPI, P.O.
More informationAn Adjustable Gap In-Line Rheometer
An Adjustable Gap In-Line Rheometer By D. M. Kalyon, H. Gokturk and I. Boz Highly Filled Materials Institute Hoboken, NJ 07030 Introduction The rheological behavior of polymer melts, and structured fluids
More informationPolymer Reaction Engineering
Polymer Reaction Engineering Polymerization Techniques Bulk Solution Suspension Emulsion Interfacial Polymerization Solid-State Gas-Phase Plasma Polymerization in Supercritical Fluids Bulk Polymerization
More informationEngineered Minerals for High Performance. Polymers and Elastomers
Engineered Minerals for High Performance Polymers and Elastomers Engineered Minerals for High Performance Polymers and Elastomers World Minerals is a global mining and minerals company and a world leader
More informationSupplemental Material for Monolithic Multilayer Microfluidics via Sacrificial Molding of 3D- Printed Isomalt. M. K. Gelber and R.
Electronic Supplementary Material (ESI) for Lab on a Chip. This journal is The Royal Society of Chemistry 2015 Supplemental Material for Monolithic Multilayer Microfluidics via Sacrificial Molding of 3D-
More informationFeatures and design of elastomer / textile engineered structures. D Boast, C Eng. F Mech E.
Features and design of elastomer / textile engineered structures D Boast, C Eng. F Mech E. Title of meeting IOM Bla blah Topics Materials: Environmental acids, water, oil, radiation etc. Bonding. Cost.
More informationStudy of multi-layer flow in coextrusion processes
ТЕKA. COMMISSION OF MOTORIZATION AND ENERGETICS IN AGRICULTURE 2014, Vol. 14, No.1, 144-153 Study of multi-layer flow in coextrusion processes Vitaliy Levanichev Volodymyr Dahl East-Ukrainian National
More informationInterfacial Instabilities in a Microfluidic Hele-Shaw Cell: Supplemental
Supplementary Material (ESI) for Soft Matter This journal is The Royal Society of Chemistry 2008 Interfacial Instabilities in a Microfluidic Hele-Shaw Cell: Supplemental Michinao Hashimoto 1, Piotr Garstecki
More informationPROFILE EXTRUSION OF WPC S SUPPORTED BY RHEOLOGICAL AND SIMULATION DATA
PROFILE EXTRUSION OF WPC S SUPPORTED BY RHEOLOGICAL AND SIMULATION DATA Cristiano R. de Santi 1, Elias Hage Jr. 1, John Vlachopoulos 2 and Carlos A. Correa 3* 1 PPG-CEM/Univ. Federal de S. Carlos UFSCar,
More informationSCALING LAWS AND FRACTAL SCREW DESIGNS TOWARDS SINGLE PELLET EXTRUSION
SCALING LAWS AND FRACTAL SCREW DESIGNS TOWARDS SINGLE PELLET EXTRUSION D.O. Kazmer Department of Plastics Engineering, Univ. Mass. Lowell Abstract Analyses and screw design concepts are presented to control
More informationIN-LINE ULTRASONIC MONITORING OF POLYMER BLENDING IN A TWIN-SCREW EXTRUDER
IN-LINE ULTRASONIC MONITORING OF OLYMER BLENDING IN A TWIN-SCREW EXTRUDER Z. Sun 1, J. Tatibouët 1, C.-K. Jen 1, H. L. Liang 2, and C.-Y. Su 2 1 Industrial Materials Institute, National Research Council
More informationRheology. A Tool for Characterization of Materials and Optimization of Polymer Processing
Rheology A Tool for Characterization of Materials and Optimization of Polymer Processing Rheology of Polymer Materials LINEAR AND NONLINEAR FLOW PROPERTIES Polymer Engineering stands for scientific and
More informationCorrections to flow data in polymer melts
Corrections to flow data in polymer melts Narongrit Sombatsompop Polymer PROcessing and Flow (P-PROF) Materials Technology, School of Energy & Materials King Mongkut s University of Technology Thonburi
More informationRheological Properties of ABS at Low Shear Rates: Effects of Phase Heterogeneity
Malaysian Polymer Journal, Vol 4, No, p9-36, 9 Available online at wwwfkkksautmmy/mpj Rheological Properties of ABS at Low Shear Rates: Effects of Phase Heterogeneity Asif Ali Qaiser *, Yasir Qayyum and
More informationIHTC DRAFT MEASUREMENT OF LIQUID FILM THICKNESS IN MICRO TUBE ANNULAR FLOW
DRAFT Proceedings of the 14 th International Heat Transfer Conference IHTC14 August 8-13, 2010, Washington D.C., USA IHTC14-23176 MEASUREMENT OF LIQUID FILM THICKNESS IN MICRO TUBE ANNULAR FLOW Hiroshi
More informationRH7-D & RH10-D CAPILLARY RHEOMETERS
RH7-D & RH10-D CAPILLARY RHEOMETERS RH7-D and RH10-D Advanced, pow suitable for rese Since its launch, the Rosand RH7 has set new standards in research level capillary rheometry. Today, the Rosand RH7
More informationNovel Process Window for the safe and continuous synthesis of tert. Butyl peroxy pivalate with micro process technology
Novel Process Window for the safe and continuous synthesis of tert. Butyl peroxy pivalate with micro process technology Segmented flow- & first Hyper SADT Experiments DBU file number: 20007/894 T. Illg
More informationTemperature dependence of critical stress for wall slip by debonding
J. Non-Newtonian Fluid Mech. 94 (2000) 151 157 Temperature dependence of critical stress for wall slip by debonding Yogesh M. Joshi a, Prashant S. Tapadia a, Ashish K. Lele a, R.A. Mashelkar b, a Chemical
More informationHIGH PRESSURE CAPILLARY RHEOMETRY ON WOOD PLASTIC COMPOSITES WITH VARIATION OF WOOD CONTENT AND MATRIX POLYMER ABSTRACT
URN (Paper): urn:nbn:de:gbv:ilm1-2014iwk-170:9 58 th ILMENAU SCIENTIFIC COLLOQUIUM Technische Universität Ilmenau, 08 12 September 2014 URN: urn:nbn:de:gbv:ilm1-2014iwk:3 HIGH PRESSURE CAPILLARY RHEOMETRY
More informationDevelopment of a continuous process for EPDM devulcanization in an extruder Sutanto, Poppy
University of Groningen Development of a continuous process for EPDM devulcanization in an extruder Sutanto, Poppy IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if
More informationBASIC CONCEPTS IN POLYMER MELT RHEOLOGY AND THEIR IMPORTANCE IN PROCESSING
CHPTER 1 SIC CONCEPTS IN POLYMER MELT RHEOLOGY ND THEIR IMPORTNCE IN PROCESSING JOHN VLCHOPOULOS 1 and NICKOLS POLYCHRONOPOULOS 2 1 Department of Chemical Engineering, McMaster University, Hamilton, ON,
More informationDYNAMIC RHEOLOGICAL MEASUREMENTS OF AQUEOUS POLYESTER DISPERSION IN BATCH REACTOR AND TWIN SCREW EXTRUDER
DYNAMIC RHEOLOGICAL MEASUREMENTS OF AQUEOUS POLYESTER DISPERSION IN BATCH REACTOR AND TWIN SCREW EXTRUDER Ali Goger *, Michael R. Thompson *, John L. Pawlak **, David J.W. Lawton *** * Department of Chemical
More informationRHEOLOGY Principles, Measurements, and Applications. Christopher W. Macosko
RHEOLOGY Principles, Measurements, and Applications I -56081-5'79~5 1994 VCH Publishers. Inc. New York Part I. CONSTITUTIVE RELATIONS 1 1 l Elastic Solid 5 1.1 Introduction 5 1.2 The Stress Tensor 8 1.2.1
More informationSimulation of mixing of heterogeneous HE components
Chapter Simulation of mixing of heterogeneous HE components The majority on high explosives (HEs) used are blend ones. Properties of components differ that produces interaction on the grain scale (mesoprocesses).
More informationCOMPATIBILIZERS VISCOSITY CHAIN EXTENDERS MODIFIERS XIBOND BLEND OPTIMIZERS COUPLING AGENTS SURFACE MODIFIERS
COMPATIBILIZERS CHAIN EXTENDERS VISCOSITY MODIFIERS XIBOND BLEND OPTIMIZERS SURFACE MODIFIERS COUPLING AGENTS XIBOND Blend Optimizers At Polyscope, we offer a wide range of polymer additives for the compounding
More informationThe significance of graphene oxide-polyacrylamide
The significance of graphene oxide-polyacrylamide interactions on the stability and microstructure of oil-in-water emulsions Heidi Jahandideh, a Pejman Ganjeh-Anzabi, a Steven L. Bryant,* a and Milana
More informationImproved Approximations in Thermal Properties for Single Screw Extrusion
Improved Approximations in Thermal Properties for Single Screw Extrusion Modified on Friday, 01 May 2015 11:49 PM by mpieler Categorized as: Paper of the Month Improved Approximations in Thermal Properties
More informationPRODUCTION OF POLYMER PARTICLES USING SUPERCRITICAL CARBON DIOIXDE AS A PROCESSING SOLVENT IN AN EXTRUDER
PRODUCTION OF POLYMER PARTICLES USING SUPERCRITICAL CARBON DIOIXDE AS A PROCESSING SOLVENT IN AN EXTRUDER Sameer P. Nalawade* and L. P. B. M. Janssen Email: S.P.Nalawade@chem.rug.nl, Fax: 0031-50-363 4479
More informationSimulation for Mixing Process in the Solid Conveying Zone
Original Paper Simulation for Mixing Process in the Solid Conveying Zone of a Twin-screw Extruder Inoue, Eiichiro*/Tsuji, Tetsuharu/Kajiwara, Toshihisa/Funatsu, Kazumori/Nakayama, Yasuya Mixing process
More informationObservations of Giant Bursts Associated with Microscale Breaking Waves
Observations of Giant Bursts Associated with Microscale Breaking Waves Ira Leifer and Sanjoy Banerjee a) Chemical Engineering Department, University of California, Santa Barbara, Santa Barbara, California,
More informationData requirements for reactor selection. Professor John H Atherton
Data requirements for reactor selection Professor John H Atherton What is my best option for manufacturing scale? Microreactor Mesoscale tubular reactor Tubular reactor OBR (oscillatory baffled flow reactor)
More informationContinuous Manufacturing of Pharmaceuticals: Scale-up of a Hot Melt Extrusion Process
An Executive Summary Continuous Manufacturing of Pharmaceuticals: Scale-up of a Hot Melt Extrusion Process By: Dirk Leister, Leader Technical Marketing, Material Characterization Products, Thermo Fisher
More informationHow to measure the shear viscosity properly?
testxpo Fachmesse für Prüftechnik 10.-13.10.2016 How to measure the shear viscosity properly? M p v Rotation Capillary Torsten Remmler, Malvern Instruments Outline How is the Shear Viscosity defined? Principle
More informationEvaluation of dynamic behavior of culverts and embankments through centrifuge model tests and a numerical analysis
Computer Methods and Recent Advances in Geomechanics Oka, Murakami, Uzuoka & Kimoto (Eds.) 2015 Taylor & Francis Group, London, ISBN 978-1-138-00148-0 Evaluation of dynamic behavior of culverts and embankments
More informationTitle: Cesa-extend a User Friendly Technology to Enhance Reprocessing and Recycling of Condensation Plastics
GPEC 24 Paper Abstract #52: Title: Cesa-extend a User Friendly Technology to Enhance Reprocessing and Recycling of Condensation Plastics Author(s): V. Karayan, Clariant Masterbatches, and M. Villalobos,
More informationFormation of Droplets and Bubbles in a Microfluidic T-junction. Scaling and Mechanism of Break-Up. Supplementary Information
Formation of Droplets and Bubbles in a Microfluidic T-junction Scaling and Mechanism of Break-Up Supplementary Information Piotr Garstecki 1,2 *, Michael J. Fuerstman 1, Howard A. Stone 3 and George M.
More informationM I N I S T R Y O F C O M M U N I C A T I O N S T E L E C O M M U N I C A T I O N S S E C T O R T E C H N I C A L S T A N D A R D F O R
M I N I S T R Y O F C O M M U N I C A T I O N S T E L E C O M M U N I C A T I O N S S E C T O R T E C H N I C A L S T A N D A R D F O R M A T E R I A L S N O. G 2 0 : 1 0 : 0 0 1 : 1 8 J U M P E R W I
More informationON THE ROLE OF EXTENSIONAL RHEOLOGY, ELASTICITY AND DEBORAH NUMBER ON NECK-IN PHENOMENON DURING FLAT FILM PRODUCTION
ON THE ROLE OF EXTENSIONAL RHEOLOGY, ELASTICITY AND DEBORAH NUMBER ON NECK-IN PHENOMENON DURING FLAT FILM PRODUCTION Martin Zatloukal 1, Tomas Barborik 1 and Costas Tzoganakis 2 1 Polymer Centre, Faculty
More informationAxial profiles of heat transfer coefficients in a liquid film evaporator
Axial profiles of heat transfer coefficients in a liquid film evaporator Pavel Timár, Ján Stopka, Vladimír Báleš Department of Chemical and Biochemical Engineering, Faculty of Chemical and Food Technology,
More information3D Compression Molding
Autodesk Simulation Moldflow Insight 2014 3D Compression Molding Executive summary In this work, the simulation results from a program developed for the three-dimensional analysis of compression molding
More informationEDEM Simulation Study of Lignite Pressing Molding with Different Particle Size
4th International Conference on Computer, Mechatronics, Control and Electronic Engineering (ICCMCEE 2015) EDEM Simulation Study of Lignite Pressing Molding with Different Particle Size Na Zhao a, Fang
More informationEvaluations of Flow and Mixing Efficiency in the Kneading Disks of a Novel Tri-Screw Extruder
Journal of Applied Fluid Mechanics, Vol. 9, No. 1, pp. 51-6, 216. Available online at www.jafmonline.net, ISSN 1735-3572, EISSN 1735-3645. Evaluations of Flow and Mixing Efficiency in the Kneading Disks
More informationUniversity of Hail Faculty of Engineering DEPARTMENT OF MECHANICAL ENGINEERING. ME Fluid Mechanics Lecture notes. Chapter 1
University of Hail Faculty of Engineering DEPARTMENT OF MECHANICAL ENGINEERING ME 311 - Fluid Mechanics Lecture notes Chapter 1 Introduction and fluid properties Prepared by : Dr. N. Ait Messaoudene Based
More informationStudy on the Pressure and Temperature Distribution of Solid-Plug Conveying Element on Centrifugal Extruder
Send Orders for Reprints toreprints@benthamscience.net 76 The Open Mechanical Engineering Journal, 2013, 7, 76-82 Open Access Study on the Pressure and Temperature Distribution of Solid-Plug Conveying
More informationTHE SUBORDINATION OF THE THREE- DIMENSIONAL FLOW INSTALLATION IN THE CONVERGING CHANNEL ON RHEOLOGICAL CHARACTERISTICS OF POLYMER STREAM
International Journal of Civil Engineering and Technology (IJCIET) Volume 9, Issue 13, December 2018, pp. 949-956, Article ID: IJCIET_09_13_095 Available online at http://www.iaeme.com/ijciet/issues.asp?jtype=ijciet&vtype=9&itype=13
More informationExp. #1-1 : Measurement of the Characteristics of the Centripetal Force by Using Springs and a Computer Interface
PAGE 1/13 Exp. #1-1 : Measurement of the Characteristics of the Centripetal Force by Using Springs and a Computer Interface Student ID Major Name Team No. Experiment Lecturer Student's Mentioned Items
More informationThe influence of bubble mechanics on some properties of blown film
The influence of bubble mechanics on some properties of blown film Christopher J. S. Petrie and Ann Petrie Department of Engineering Mathematics, University of Newcastle, Newcastle upon Tyne, NE1 7RU,
More informationMicroscale Modeling of Carbonate Precipitation. ERC Team Members CBBG Faculty Narayanan Neithalath, ASU Edward Kavazanjian ASU
Microscale Modeling of Carbonate Precipitation ERC Team Members CBBG Faculty Narayanan Neithalath, ASU Edward Kavazanjian ASU Graduate Students Pu Yang Other Research Staff Nasser Hamdan Project Goals
More informationMeasuring Slip at a Polymer/Polymer Interface during Three-Layer Flow
Rapid Communication Nihon Reoroji Gakkaishi Vol.41, No.4, 235~239 (Journal of the Society of Rheology, Japan) 2013 The Society of Rheology, Japan Measuring Slip at a Polymer/Polymer Interface during Three-Layer
More informationDISPERSIVE AND DISTRIBUTIVE MIXING CHARACTERIZATION IN EXTRUSION EQUIPMENT
DISPERSIVE AND DISTRIBUTIVE MIXING CHARACTERIZATION IN EXTRUSION EQUIPMENT Winston Wang and Ica Manas-Zloczower Department of Macromolecular Science Case Western Reserve University Abstract Mixing is a
More information2 Navier-Stokes Equations
1 Integral analysis 1. Water enters a pipe bend horizontally with a uniform velocity, u 1 = 5 m/s. The pipe is bended at 90 so that the water leaves it vertically downwards. The input diameter d 1 = 0.1
More informationAnalysis of Melt Spinning Master-Curves of Low Density Polyethylene
Analysis of Melt Spinning Master-Curves of Low Density Polyethylene Ji-Zhao Liang, 1 Lei Zhong, 1 Kejian Wang 2 1 Research Division of Green Function Materials and Equipment, School of Mechanical and Automotive
More informationStress and fatigue analyses of a PWR reactor core barrel components
Seite 1 von 10 Stress and fatigue analyses of a PWR reactor core barrel components L. Mkrtchyan, H. Schau, H. Eggers TÜV SÜD ET Mannheim, Germany Abstract: The integrity of the nuclear reactor core barrel
More informationNUMERICAL ANALYSIS OF THE EFFECT OF EXTRUSION CONDITIONS ON FLOW IN SLIT DIE RHEOMETER
Third International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia - December 3 NUMERICAL ANALYSIS OF THE EFFECT OF EXTRUSION CONDITIONS ON FLOW IN SLIT DIE RHEOMETER
More informationNumerical Optimization of Heating for High- Speed Rotating Cup by Means of Multiphysics Modeling and its Experimental Verification
Numerical Optimization of Heating for High- Speed Rotating Cup by Means of Multiphysics Modeling and its Experimental Verification September 17-19, 2014 Cambridge, UK Kanat Kyrgyzbaev, M. Terock, University
More informationWorld Academy of Science, Engineering and Technology
Effect of Surface Tracking on LLDPE-NR/TiO2 Nanocomposite Conductivity Using PDC Technique M. S. A. Aziz 1, N. A. Muhamad 1,N.A.M.Jamail 12, Q. E. Kamarudin 3 1 Institute of High Voltage & High Current,
More informationERTH 456 / GEOL 556 Volcanology. Lecture 06: Conduits
1 / 28 ERTH 456 / GEOL 556 Volcanology Lecture 06: Conduits Ronni Grapenthin rg@nmt.edu MSEC 356, x5924 hours: TR 3-4PM or appt. September 12, 2016 2 / 28 How does magma get from source to surface? What
More informationA calibration method for a new type of rheometer
ANNUAL TRANSACTIONS OF THE NORDIC RHEOLOGY SOCIETY, VOL 14, 2006 A calibration method for a new type of rheometer C Salas-Bringas 1, WK Jeksrud 1, O-I Lekang 1 and RB Schüller 2 1 Dep of Mathematical Sciences
More information