Process Chemistry Toolbox  Mixing


 Silvester Allen
 1 years ago
 Views:
Transcription
1 Process Chemistry Toolbox  Mixing
2 Industrial diffusion flames are turbulent Laminar Turbulent
3 3 T s of combustion Time Temperature Turbulence
4 Visualization of Laminar and Turbulent flow Laminar Turbulent  Effective mixing
5 Characteristics of turbulence Effective mixing Eddy fluid parcel 3D Timedependent Gustavo Assi
6 Turbulence  chemistry interaction Heat 1 = i Heat 2 Heat 3 Heat n Smallest eddies  most of dissipation  size limited by the Kolmogorov length scale Large eddies  receive kinetic energy from mean flow  size limited by the geometry of e.g. the furnace Eddy: transport of a parcel of fluid (for example fuel or oxidizer) Dissipation of kinetic energy to heat ε mixing on molecular level Reactions occur on molecular level!
7 Mixing considerations in industrial scale furnaces Example: black liquor recovery boiler ~85 m ~15 x 15 m
8 (m/s) >50 Mixing considerations in industrial scale furnaces Example: black liquor recovery boiler Combustion air  Staging  Distribution over cross section (O 2 vol%) 20 m 3 m 0.2 m
9 Introduction to Computational Fluid Dynamics
10 Process Chemistry Toolbox  Mixing Computational Fluid Dynamics (CFD)  A tool for studying reactive flows in complex geometries ~85 m Example: Black Liquor Recovery Boiler ~15 x 15 m
11 Computational Fluid Dynamics (CFD) Boundary conditions and Predictions (m/s) Gas flow Fuel
12 Computational Fluid Dynamics (CFD) Boundary conditions and Predictions (%) O 2 concentration ( C) Temperature
13 The Computational Procedure (1) Technical Device (boundary conditions/ geometry known) Computational Domain with Computational Grid Computational Cell/ Control Volume (Mueller)
14 The Computational Procedure (2) Computational Cell/ Control Volume Balancing for: Mass Momentum Energy etc. Boundary Value Problem Iterative Process CFDResult (complete description u, v, w, p, h, T) (Mueller)
15 Iteration towards a converged solution
16 Modeling conversion of char forming fuel
17 Modeling conversion of char forming fuel Drying Pyrolysis Char combustion H 2 O Volatiles CharC as CO Heat transfer Heat transfer Mass transfer and kinetics (O 2, CO 2, H 2 O)
18 Modeling conversion of char forming fuel Drying Pyrolysis Char combustion
19 Modeling conversion of char forming fuel 6 mm initial diameter Drying Pyrolysis Char combustion
20 Modeling conversion of char forming fuel 2 mm initial diameter
21 Modeling conversion of char forming fuel Average initial diameter ( C) 4 mm 7 mm
22 Turbulent flow some modeling approaches
23 Pulverized coal flame photograph LES RANS (Courtesy of Phil Smith, U. Of Utah)
24 Turbulent flow some modeling approaches Computational expense increases DNS:  No turbulence model!  eq to analytical solution of turbulent flow (Hanjalic et al. Analysis and Modelling of Physical Transport Phenomena )
25 Visualization of Laminar and Turbulent flow Laminar Turbulent  Effective mixing
26 RANS  Conservation equations General property balance (conservation equation) / t ( U ) G ( 2 ) Applied to turbulence with instantaneous velocity U U U ' / t ( U ) ( ) [ G 2 ( U ' ' )] Same form as original equation Average properties Fluctuations Unknowns > Equations Closure problem Turbulence models
27 1equation model 2equation model  kε model  kθ model Reynolds Stress Model (RSM) Some turbulence models isotropic turbulence representative stress (turbulent viscosity) modelled nonisotropic turbulence indiviual stresses in all directions modelled ' U ' Momentum ' ' [ ( U )] fluctuations ( ' U U ' ) '2 U x ' U yu ' U zu ' x ' x U U ' x U ' z '2 y U U ' y ' y U U U ' x ' y U U '2 z ' z ' z Reynolds stresses
28 The scalar variables k and calculated by scalar transport equations i j i j i j i S + x ~ x ~ ~ x ~ t u j Kinetic energy k: k Dissipation : k turb Pr i ~ i S Pr turb k P ~ c P k ~ c k ~ ~ 1 k 1 Standard k turbulence model Turbulent viscosity
29 Mixing  Exercise Methane combustion with air, λ = 1.2 Air Methane Steps included in calculation  Chemical reactions  Calculation grid  Boundary conditions  Iterations
30 Mixing  Exercise Stoichiometric overall reaction CH O 2 CO H 2 O Chemical reactions considered in model 1: CH 4 + ½ O 2 CO + 2 H 2 2: CH 4 + H 2 O CO + 3 H 2 3: H 2 + ½ O 2 H 2 O 4: CO + H 2 O CO 2 + H 2 5: CO 2 + H 2 CO + H 2 O Turbulencechemistry interaction Finite rate / Eddydissipation
31 Mixing  Exercise Calculation grid from 3D to 2D
32 Mixing  Exercise Calculation grid outer dimensions 100 m 40 m Outlet 50 cm 20 cm
33 Mixing  Exercise Calculation grid Cells  connected reactors Calculation procedure Boundary conditions Iterations Balancing for  momentum  mass  species  energy in + gen = out + acc Air Methane Steadystate (acc =0)
34 Mixing  Exercise At start of calculation Initial values are given 0 iterations  Velocity  Temperature  Species concentrations As calculation proceeds  Boundary conditions unchanged  Initial values inside reactor are updated toward converged solution
35 Mixing  Exercise
36
37 Example of CFD calculation (m/s) Velocity magnitude after 3000 iterations Contours Along symmetry axis
38 Example of CFD calculation O 2 mole fraction after 3000 iterations Contours Along symmetry axis
39 Example of CFD calculation CH 4 mole fraction after 3000 iterations Contours Along symmetry axis
40 Example of CFD calculation Gas temperature (K) after 3000 iterations Contours Along symmetry axis Heat released from CH 4 combustion is removed from gas
41 Example of CFD calculation Species mole fractions and T after 3000 iterations T 2000 () 0.2 CH 4 H 2 O (K) H 2 0 CO CO 2 O Position along Position symmetry (m) axis (m)
Exercises in Combustion Technology
Exercises in Combustion Technology Exercise 4: Turbulent Premixed Flames Turbulent Flow: Task 1: Estimation of Turbulence Quantities BorghiPeters diagram for premixed combustion Task 2: Derivation of
More informationThermal NO Predictions in Glass Furnaces: A Subgrid Scale Validation Study
Feb 12 th 2004 Thermal NO Predictions in Glass Furnaces: A Subgrid Scale Validation Study Padmabhushana R. Desam & Prof. Philip J. Smith CRSIM, University of Utah Salt lake city, UT84112 18 th Annual
More informationBest Practice Guidelines for Combustion Modeling. Raphael David A. Bacchi, ESSS
Best Practice Guidelines for Combustion Modeling Raphael David A. Bacchi, ESSS PRESENTATION TOPICS Introduction; Combustion Phenomenology; Combustion Modeling; Reaction Mechanism; Radiation; Case Studies;
More informationEVALUATION OF FOUR TURBULENCE MODELS IN THE INTERACTION OF MULTI BURNERS SWIRLING FLOWS
EVALUATION OF FOUR TURBULENCE MODELS IN THE INTERACTION OF MULTI BURNERS SWIRLING FLOWS A Aroussi, S Kucukgokoglan, S.J.Pickering, M.Menacer School of Mechanical, Materials, Manufacturing Engineering and
More informationADVANCED DES SIMULATIONS OF OXYGAS BURNER LOCATED INTO MODEL OF REAL MELTING CHAMBER
ADVANCED DES SIMULATIONS OF OXYGAS BURNER LOCATED INTO MODEL OF REAL MELTING CHAMBER Ing. Vojtech Betak Ph.D. Aerospace Research and Test Establishment Department of Engines Prague, Czech Republic Abstract
More informationTurbulence: Basic Physics and Engineering Modeling
DEPARTMENT OF ENERGETICS Turbulence: Basic Physics and Engineering Modeling Numerical Heat Transfer Pietro Asinari, PhD Spring 2007, TOP UIC Program: The Master of Science Degree of the University of Illinois
More informationMass Transfer in Turbulent Flow
Mass Transfer in Turbulent Flow ChEn 6603 References: S.. Pope. Turbulent Flows. Cambridge University Press, New York, 2000. D. C. Wilcox. Turbulence Modeling for CFD. DCW Industries, La Caada CA, 2000.
More informationTurbulence (January 7, 2005)
http://www.tfd.chalmers.se/grkurs/mtf071 70 Turbulence (January 7, 2005) The literature for this lecture (denoted by LD) and the following on turbulence models is: L. Davidson. An Introduction to Turbulence
More informationSoot formation in turbulent non premixed flames
Soot formation in turbulent non premixed flames A. Cuoci 1, A. Frassoldati 1, D. Patriarca 1, T. Faravelli 1, E. Ranzi 1, H. Bockhorn 2 1 Dipartimento di Chimica, Materiali e Ing. Chimica, Politecnico
More informationTurbulent Boundary Layers & Turbulence Models. Lecture 09
Turbulent Boundary Layers & Turbulence Models Lecture 09 The turbulent boundary layer In turbulent flow, the boundary layer is defined as the thin region on the surface of a body in which viscous effects
More informationA NUMERICAL ANALYSIS OF COMBUSTION PROCESS IN AN AXISYMMETRIC COMBUSTION CHAMBER
SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCEAFASES 2016 A NUMERICAL ANALYSIS OF COMBUSTION PROCESS IN AN AXISYMMETRIC COMBUSTION CHAMBER Alexandru DUMITRACHE*, Florin FRUNZULICA ** *Institute of
More informationLES of the Sandia Flame D Using an FPV Combustion Model
Available online at www.sciencedirect.com ScienceDirect Energy Procedia 82 (2015 ) 402 409 ATI 201570th Conference of the ATI Engineering Association LES of the Sandia Flame D Using an FPV Combustion
More informationSimulations for Enhancing Aerodynamic Designs
Simulations for Enhancing Aerodynamic Designs 2. Governing Equations and Turbulence Models by Dr. KANNAN B T, M.E (Aero), M.B.A (Airline & Airport), PhD (Aerospace Engg), Grad.Ae.S.I, M.I.E, M.I.A.Eng,
More informationLecture 14. Turbulent Combustion. We know what a turbulent flow is, when we see it! it is characterized by disorder, vorticity and mixing.
Lecture 14 Turbulent Combustion 1 We know what a turbulent flow is, when we see it! it is characterized by disorder, vorticity and mixing. In a fluid flow, turbulence is characterized by fluctuations of
More informationAdvanced Turbulence Models for Emission Modeling in Gas Combustion
1 Advanced Turbulence Models for Emission Modeling in Gas Combustion Ville Tossavainen, Satu Palonen & Antti Oksanen Tampere University of Technology Funding: Tekes, Metso Power Oy, Andritz Oy, Vattenfall
More informationLargeeddy simulation of an industrial furnace with a crossflowjet combustion system
Center for Turbulence Research Annual Research Briefs 2007 231 Largeeddy simulation of an industrial furnace with a crossflowjet combustion system By L. Wang AND H. Pitsch 1. Motivation and objectives
More informationNumerical Modeling of Anode Baking Process with COMSOL Multiphysics
Numerical Modeling of Anode Baking Process with COMSOL Multiphysics P. Nakate 1,2, W. Voogd de 3, D.J.P. Lahaye 1, C. Vuik 1, M. Talice 4 1. Department of applied mathematics, Delft University of technology,
More informationA comparison between two different Flamelet reduced order manifolds for nonpremixed turbulent flames
8 th U. S. National Combustion Meeting Organized by the Western States Section of the Combustion Institute and hosted by the University of Utah May 1922, 2013 A comparison between two different Flamelet
More informationDr.Ing. Frank Beyrau Content of Lecture
Content of Lecture 1. Phenomenology of Combustion 2. Thermodynamic Fundamentals 3. Chemical Reaction Kinetics 4. Ignition and Ignition Limits 5. Laminar Flame Theory 6. Turbulent Combustion 7. Pollutants
More informationMUSCLES. Presented by: Frank Wetze University of Karlsruhe (TH)  EBI / VB month review, 21 September 2004, Karlsruhe
MUSCLES Modelling of UnSteady Combustion in Low Emission Systems G4RDCT200200644 R&T project within the 5 th Framework program of the European Union: 1 Numerical computations of reacting flow field
More informationIntroduction to Turbulence and Turbulence Modeling
Introduction to Turbulence and Turbulence Modeling Part I Venkat Raman The University of Texas at Austin Lecture notes based on the book Turbulent Flows by S. B. Pope Turbulent Flows Turbulent flows Commonly
More informationDEVELOPMENT OF CFD MODEL FOR A SWIRL STABILIZED SPRAY COMBUSTOR
DRAFT Proceedings of ASME IMECE: International Mechanical Engineering Conference & Exposition Chicago, Illinois Nov. 510, 2006 IMECE200614867 DEVELOPMENT OF CFD MODEL FOR A SWIRL STABILIZED SPRAY COMBUSTOR
More informationTutorial School on Fluid Dynamics: Aspects of Turbulence Session I: Refresher Material Instructor: James Wallace
Tutorial School on Fluid Dynamics: Aspects of Turbulence Session I: Refresher Material Instructor: James Wallace Adapted from Publisher: John S. Wiley & Sons 2002 Center for Scientific Computation and
More informationTurbulence Modeling I!
Outline! Turbulence Modeling I! Grétar Tryggvason! Spring 2010! Why turbulence modeling! Reynolds Averaged Numerical Simulations! Zero and One equation models! Two equations models! Model predictions!
More informationImpact of numerical method on autoignition in a temporally evolving mixing layer at various initial conditions
Journal of Physics: Conference Series PAPER OPEN ACCESS Impact of numerical method on autoignition in a temporally evolving mixing layer at various initial conditions To cite this article: A Rosiak and
More informationNumerical Methods in Aerodynamics. Turbulence Modeling. Lecture 5: Turbulence modeling
Turbulence Modeling Niels N. Sørensen Professor MSO, Ph.D. Department of Civil Engineering, Alborg University & Wind Energy Department, Risø National Laboratory Technical University of Denmark 1 Outline
More informationNumerical Heat and Mass Transfer
Master Degree in Mechanical Engineering Numerical Heat and Mass Transfer 19 Turbulent Flows Fausto Arpino f.arpino@unicas.it Introduction All the flows encountered in the engineering practice become unstable
More informationIntroduction Flares: safe burning of waste hydrocarbons Oilfields, refinery, LNG Pollutants: NO x, CO 2, CO, unburned hydrocarbons, greenhouse gases G
School of Process, Environmental and Materials Engineering Computational study of combustion in flares: structure and emission of a jet flame in turbulent crossflow GERG Academic Network Event Brussels
More informationNUMERICAL ANALYSIS OF TURBULENT FLAME IN AN ENCLOSED CHAMBER
NUMERICAL ANALYSIS OF TURBULENT FLAME IN AN ENCLOSED CHAMBER Naveen Kumar D 1*, Pradeep R 2 and Bhaktavatsala H R 3 1 Assistant Professor Department of Mechanical Engineering, M S Engineering College,
More informationLecture 9 Laminar Diffusion Flame Configurations
Lecture 9 Laminar Diffusion Flame Configurations 9.1 Different Flame Geometries and Single Droplet Burning Solutions for the velocities and the mixture fraction fields for some typical laminar flame configurations.
More informationIntroduction of compressible turbulence
Introduction of compressible turbulence 1 Main topics Derive averaged equations for compressible turbulence Introduce a math. technique to perform averaging in presence of density variation Favre average
More informationModeling of turbulence in stirred vessels using large eddy simulation
Modeling of turbulence in stirred vessels using large eddy simulation André Bakker (presenter), Kumar Dhanasekharan, Ahmad Haidari, and SungEun Kim Fluent Inc. Presented at CHISA 2002 August 2529, Prague,
More informationTOPICAL PROBLEMS OF FLUID MECHANICS 97
TOPICAL PROBLEMS OF FLUID MECHANICS 97 DOI: http://dx.doi.org/10.14311/tpfm.2016.014 DESIGN OF COMBUSTION CHAMBER FOR FLAME FRONT VISUALISATION AND FIRST NUMERICAL SIMULATION J. Kouba, J. Novotný, J. Nožička
More informationModeling of Wall Heat Transfer and Flame/Wall Interaction A Flamelet Model with HeatLoss Effects
9 th U. S. National Combustion Meeting Organized by the Central States Section of the Combustion Institute May 1720, 2015 Cincinnati, Ohio Modeling of Wall Heat Transfer and Flame/Wall Interaction A Flamelet
More informationCFD and Kinetic Analysis of Bluff Body Stabilized Flame
CFD and Kinetic Analysis of Bluff Body Stabilized ame A. Dicorato, E. Covelli, A. Frassoldati, T. Faravelli, E. Ranzi Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, ITALY
More informationComparison of Turbulence Models in the Flow over a BackwardFacing Step Priscila Pires Araujo 1, André Luiz Tenório Rezende 2
Comparison of Turbulence Models in the Flow over a BackwardFacing Step Priscila Pires Araujo 1, André Luiz Tenório Rezende 2 Department of Mechanical and Materials Engineering, Military Engineering Institute,
More informationTurbulens Teori och modellering
Turbulens Teori och modellering Introduction Two questions: Why did you chose this course? What are your expectations? Turbulence Theory and modelling Goals Understanding the phenomena that affects the
More informationFlow Structure Investigations in a "Tornado" Combustor
Flow Structure Investigations in a "Tornado" Combustor Igor Matveev Applied Plasma Technologies, Falls Church, Virginia, 46 Serhiy Serbin National University of Shipbuilding, Mikolayiv, Ukraine, 545 Thomas
More informationCFD ANALYSIS OF TURBULENCE EFFECT ON REACTION IN STIRRED TANK REACTORS
CFD ANALYSIS OF TURBULENCE EFFECT ON REACTION IN STIRRED TANK REACTORS Udaya Bhaskar Reddy R*, Gopalakrishnan S, Ramasamy E Department of Chemical Engineering, Coimbatore Institute of Technology, Coimbatore
More informationA NOVEL VLES MODEL FOR TURBULENT FLOW SIMULATIONS
June 30  July 3, 2015 Melbourne, Australia 9 7B4 A NOVEL VLES MODEL FOR TURBULENT FLOW SIMULATIONS C.Y. Chang, S. Jakirlić, B. Krumbein and C. Tropea Institute of Fluid Mechanics and Aerodynamics /
More informationComputational Fluid Dynamics 2
Seite 1 Introduction Computational Fluid Dynamics 11.07.2016 Computational Fluid Dynamics 2 Turbulence effects and Particle transport Martin Pietsch Computational Biomechanics Summer Term 2016 Seite 2
More informationCombustion. Indian Institute of Science Bangalore
Combustion Indian Institute of Science Bangalore Combustion Applies to a large variety of natural and artificial processes Source of energy for most of the applications today Involves exothermic chemical
More informationNumerical Investigation of Ignition Delay in MethaneAir Mixtures using Conditional Moment Closure
21 st ICDERS July 2327, 27 Poitiers, France Numerical Investigation of Ignition Delay in MethaneAir Mixtures using Conditional Moment Closure Ahmad S. El Sayed, Cécile B. Devaud Department of Mechanical
More informationThere are no simple turbulent flows
Turbulence 1 There are no simple turbulent flows Turbulent boundary layer: Instantaneous velocity field (snapshot) Ref: Prof. M. GadelHak, University of Notre Dame Prediction of turbulent flows standard
More informationComputation of turbulent natural convection with buoyancy corrected second moment closure models
Computation of turbulent natural convection with buoyancy corrected second moment closure models S. Whang a, H. S. Park a,*, M. H. Kim a, K. Moriyama a a Division of Advanced Nuclear Engineering, POSTECH,
More informationBefore we consider two canonical turbulent flows we need a general description of turbulence.
Chapter 2 Canonical Turbulent Flows Before we consider two canonical turbulent flows we need a general description of turbulence. 2.1 A Brief Introduction to Turbulence One way of looking at turbulent
More informationOverview of Turbulent Reacting Flows
Overview of Turbulent Reacting Flows Outline Various Applications Overview of available reacting flow models LES Latest additions Example Cases Summary Reacting Flows Applications in STARCCM+ EverExpanding
More informationHIGHFIDELITY MODELS FOR COAL COMBUSTION: TOWARD HIGHTEMPERATURE OXYCOAL FOR DIRECT POWER EXTRACTION
1 HIGHFIDELITY MODELS FOR COAL COMBUSTION: TOWARD HIGHTEMPERATURE OXYCOAL FOR DIRECT POWER EXTRACTION XINYU ZHAO UNIVERSITY OF CONNECTICUT DANIEL C. HAWORTH 1, MICHAEL F. MODEST 2, JIAN CAI 3 1 THE
More informationProject Topic. Simulation of turbulent flow laden with finitesize particles using LBM. Leila Jahanshaloo
Project Topic Simulation of turbulent flow laden with finitesize particles using LBM Leila Jahanshaloo Project Details Turbulent flow modeling Lattice Boltzmann Method All I know about my project Solidliquid
More informationENTROPY PRODUCTION MODELING IN CFD OF TURBULENT COMBUSTION FLOW
ENTROPY PRODUCTION MODELING IN CFD OF TURBULENT COMBUSTION FLOW Ivar S. Ertesvåg, Jostein Kolbu Department of Energy and Process Engineering Norwegian University of Science and Technology NO7491 Trondheim,
More informationROLE OF THE VERTICAL PRESSURE GRADIENT IN WAVE BOUNDARY LAYERS
ROLE OF THE VERTICAL PRESSURE GRADIENT IN WAVE BOUNDARY LAYERS Karsten Lindegård Jensen 1, B. Mutlu Sumer 1, Giovanna Vittori 2 and Paolo Blondeaux 2 The pressure field in an oscillatory boundary layer
More informationModel Studies on SlagMetal Entrainment in Gas Stirred Ladles
Model Studies on SlagMetal Entrainment in Gas Stirred Ladles Anand Senguttuvan Supervisor Gordon A Irons 1 Approach to Simulate Slag Metal Entrainment using Computational Fluid Dynamics Introduction &
More informationJournal of Asian Scientific Research THE FLAME PROPAGATION OF VARIOUS FUELS IN A PARTICULAR COMBUSTION CHAMBER OF 4.VALVE ENGINES
Journal of Asian Scientific Research ISSN(e): 22231331/ISSN(p): 22265724 URL: www.aessweb.com THE FLAME PROPAGATION OF VARIOUS FUELS IN A PARTICULAR COMBUSTION CHAMBER OF 4.VALVE ENGINES Zoran Jovanovic
More informationIntroduction to Turbulence AEEM Why study turbulent flows?
Introduction to Turbulence AEEM 7063003 Dr. Peter J. Disimile UCFEST Department of Aerospace Engineering Peter.disimile@uc.edu Intro to Turbulence: C1A Why 1 Most flows encountered in engineering and
More informationPDF Modeling and Simulation of Premixed Turbulent Combustion
Monte Carlo Methods Appl. Vol. No. (), pp. 43 DOI 5 / MCMA.7. c de Gruyter PDF Modeling and Simulation of Premixed Turbulent Combustion Michael Stöllinger and Stefan Heinz Abstract. The use of probability
More informationJ. Szantyr Lecture No. 4 Principles of the Turbulent Flow Theory The phenomenon of two markedly different types of flow, namely laminar and
J. Szantyr Lecture No. 4 Principles of the Turbulent Flow Theory The phenomenon of two markedly different types of flow, namely laminar and turbulent, was discovered by Osborne Reynolds (184 191) in 1883
More informationCalculating equation coefficients
Fluid flow Calculating equation coefficients Construction Conservation Equation Surface Conservation Equation Fluid Conservation Equation needs flow estimation needs radiation and convection estimation
More informationNUMERICAL SIMULATION OF PLASMA ASSISTED TURBULENT COMBUSTION
NUMERICAL SIMULATION OF PLASMA ASSISTED TURBULENT COMBUSTION BY ANAND SRINIVAS ANKALA A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR
More informationNumerical investigation of swirl flow inside a supersonic nozzle
Advances in Fluid Mechanics IX 131 Numerical investigation of swirl flow inside a supersonic nozzle E. Eslamian, H. Shirvani & A. Shirvani Faculty of Science and Technology, Anglia Ruskin University, UK
More informationPDF modeling and simulation of premixed turbulent combustion
Monte Carlo Methods Appl. Vol. 4 No. 4 (8), pp. 343 377 DOI. / MCMA.8.6 c de Gruyter 8 PDF modeling and simulation of premixed turbulent combustion Michael Stöllinger and Stefan Heinz Abstract. The use
More informationPremixed MILD Combustion of Propane in a Cylindrical. Furnace with a Single Jet Burner: Combustion and. Emission Characteristics
Premixed MILD Combustion of Propane in a Cylindrical Furnace with a Single Jet Burner: Combustion and Emission Characteristics KinPang Cheong a, c, Guochang Wang a, Jianchun Mi a*, Bo Wang a, Rong Zhu
More informationModelling of a Passive Catalytic Recombiner for Hydrogen Mitigation by CFD Methods
Modelling of a Passive Catalytic Recombiner for Hydrogen Mitigation by CFD Methods Antoni Rożeń Warsaw University of Technology, Faculty of Chemical and Process Engineering Waryńskiego 1, 00645 Warszawa,
More informationCHARACTERISTIC OF VORTEX IN A MIXING LAYER FORMED AT NOZZLE PITZDAILY USING OPENFOAM
CHARACTERISTIC OF VORTEX IN A MIXING LAYER FORMED AT NOZZLE PITZDAILY USING OPENFOAM Suheni and Syamsuri Department of Mechanical Engineering, Adhi Tama Institute of Technology Surabaya, Indonesia EMail:
More informationFluid Dynamics and Balance Equations for Reacting Flows
Fluid Dynamics and Balance Equations for Reacting Flows Combustion Summer School 2018 Prof. Dr.Ing. Heinz Pitsch Balance Equations Basics: equations of continuum mechanics balance equations for mass and
More informationInsights into Model Assumptions and Road to Model Validation for Turbulent Combustion
Insights into Model Assumptions and Road to Model Validation for Turbulent Combustion Venke Sankaran AFRL/RQR 2015 AFRL/RQR Basic Research Review UCLA Jan 20, 2015 AFTC PA Release# 15011, 16 Jan 2015 Goals
More informationOn the transient modelling of impinging jets heat transfer. A practical approach
Turbulence, Heat and Mass Transfer 7 2012 Begell House, Inc. On the transient modelling of impinging jets heat transfer. A practical approach M. Bovo 1,2 and L. Davidson 1 1 Dept. of Applied Mechanics,
More informationAn Introduction to Theories of Turbulence. James Glimm Stony Brook University
An Introduction to Theories of Turbulence James Glimm Stony Brook University Topics not included (recent papers/theses, open for discussion during this visit) 1. Turbulent combustion 2. Turbulent mixing
More informationLES Approaches to Combustion
LES Approaches to combustion LES Approaches to combustion LES Approaches to Combustion W P Jones Department of Mechanical Engineering Imperial College London Exhibition Road London SW7 2AZ SIG on Combustion
More informationNovel uses of DNS with turbulent separation for RANS models
Novel uses of DNS with turbulent separation for RANS models Gary Coleman*, Chris Rumsey* and Philippe Spalart** *NASA Langley Research Center **Boeing Commercial Airplanes 1 Outline q Flow: spatial separation
More informationDEVELOPMENT AND VALIDATION OF A COAL COMBUSTION MODEL FOR PULVERISED COAL COMBUSTION
Proceedings of the 14th International Heat Transfer Conference IHTC14 August 813, 010, Washington, DC, USA IHTC14 DEVELOPMENT AND VALIDATION OF A COAL COMBUSTION MODEL FOR PULVERISED COAL COMBUSTION
More informationKeywords  Gas Turbine, Exhaust Diffuser, Annular Diffuser, CFD, Numerical Simulations.
Numerical Investigations of PGT10 Gas Turbine Exhaust Diffuser Using Hexahedral Dominant Grid Vaddin Chetan, D V Satish, Dr. Prakash S Kulkarni Department of Mechanical Engineering, VVCE, Mysore, Department
More informationSection 14.1: Description of the Equilibrium Mixture Fraction/PDF Model. Section 14.2: Modeling Approaches for NonPremixed Equilibrium Chemistry
Chapter 14. Combustion Modeling NonPremixed In nonpremixed combustion, fuel and oxidizer enter the reaction zone in distinct streams. This is in contrast to premixed systems, in which reactants are mixed
More informationEXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER
THERMAL SCIENCE: Year 2014, Vol. 18, No. 4, pp. 13551360 1355 EXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER by Rangasamy RAJAVEL Department of Mechanical Engineering, AMET University,
More informationDevelopment and Validation of a Partially Coupled Soot Model for Turbulent Kerosene Combustion in Industrial Applications
Development and Validation of a Partially Coupled Soot Model for Turbulent Kerosene Combustion in Industrial Applications by Bijan Shahriari A thesis submitted in conformity with the requirements for the
More informationTowards regime identification and appropriate chemistry tabulation for computation of autoigniting turbulent reacting flows
Center for Turbulence Research Annual Research Briefs 009 199 Towards regime identification and appropriate chemistry tabulation for computation of autoigniting turbulent reacting flows By M. Kostka, E.
More informationIntroduction to Heat and Mass Transfer. Week 12
Introduction to Heat and Mass Transfer Week 12 Next Topic Convective Heat Transfer» Heat and Mass Transfer Analogy» Evaporative Cooling» Types of Flows Heat and Mass Transfer Analogy Equations governing
More informationMultiScale Modeling of Turbulence and Microphysics in Clouds. Steven K. Krueger University of Utah
MultiScale Modeling of Turbulence and Microphysics in Clouds Steven K. Krueger University of Utah 10,000 km Scales of Atmospheric Motion 1000 km 100 km 10 km 1 km 100 m 10 m 1 m 100 mm 10 mm 1 mm Planetary
More informationRANSSLFM and LESSLFM numerical simulations of turbulent nonpremixed oxyfuel jet flames using CO2/O2 mixture
Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 217 RANSSLFM and LESSLFM numerical simulations of turbulent nonpremixed oxyfuel jet flames using CO2/O2 mixture
More informationHEAT TRANSFER IN A RECIRCULATION ZONE AT STEADYSTATE AND OSCILLATING CONDITIONS  THE BACK FACING STEP TEST CASE
HEAT TRANSFER IN A RECIRCULATION ZONE AT STEADYSTATE AND OSCILLATING CONDITIONS  THE BACK FACING STEP TEST CASE A.K. Pozarlik 1, D. Panara, J.B.W. Kok 1, T.H. van der Meer 1 1 Laboratory of Thermal Engineering,
More informationUnsteady RANS and LES Analyses of Hooper s Hydraulics Experiment in a Tight Lattice Bare Rodbundle
Unsteady RANS and LES Analyses of Hooper s Hydraulics Experiment in a Tight Lattice Bare Rodbundle L. Chandra* 1, F. Roelofs, E. M. J. Komen E. Baglietto Nuclear Research and consultancy Group Westerduinweg
More informationS. Kadowaki, S.H. Kim AND H. Pitsch. 1. Motivation and objectives
Center for Turbulence Research Annual Research Briefs 2005 325 The dynamics of premixed flames propagating in nonuniform velocity fields: Assessment of the significance of intrinsic instabilities in turbulent
More informationFlow and added smallscale topologies in a turbulent premixed flame
Flow and added smallscale topologies in a turbulent premixed flame L. Cifuentes*, A. Kempf* and C. Dopazo** luis.cifuentes@unidue.de *University of DuisburgEssen, Chair of Fluid Dynamics, Duisburg 
More informationNO x Emissions Prediction from a Turbulent Diffusion Flame
NO x Emissions Prediction from a Turbulent Diffusion Flame Akpan, Patrick 1 and Njiofor, Tobenna 2 1 Department of Mechanical Engineering, University of Nigeria, Nsukka 2 Process Systems Engineering, Cranfield
More informationCombustion Theory and Applications in CFD
Combustion Theory and Applications in CFD Princeton Combustion Summer School 2018 Prof. Dr.Ing. Heinz Pitsch Copyright 201 8 by Heinz Pitsch. This material is not to be sold, reproduced or distributed
More informationModelling DetailedChemistry Effects on Turbulent Diffusion Flames using a Parallel SolutionAdaptive Scheme
Modelling DetailedChemistry Effects on Turbulent Diffusion Flames using a Parallel SolutionAdaptive Scheme by Pradeep Kumar Jha A thesis submitted in conformity with the requirements for the degree of
More informationTurbulence Laboratory
Objective: CE 319F Elementary Mechanics of Fluids Department of Civil, Architectural and Environmental Engineering The University of Texas at Austin Turbulence Laboratory The objective of this laboratory
More informationReactive Flows using TransAT. June 2013 Jan van Rickenbach, Daniel Rakotonirina ASCOMP
Reactive Flows using TransAT June 2013 Jan van Rickenbach, Daniel Rakotonirina ASCOMP www.ascomp.ch jan@ascomp.ch Model portfolio Reactive flows Infinitely Fast Chemistry (nonpremixed) EDC EDCSDT (Scalar
More informationCFD Modeling Ensures Safe and Environmentally Friendly Performance in Shell Claus OffGas Treating (SCOT) Unit
CFD Modeling Ensures Safe and Environmentally Friendly Performance in Shell Claus OffGas Treating (SCOT) Unit Mike Henneke, Ph.D. P.E. and Joseph Smith, Ph.D. CDacces John Petersen and John McDonald,
More informationErratum to: High speed mixture fraction and temperature imaging of pulsed, turbulent fuel jets auto igniting in high temperature, vitiated co flows
DOI 10.1007/s0034801521019 ERRATUM Erratum to: High speed mixture fraction and temperature imaging of pulsed, turbulent fuel jets auto igniting in high temperature, vitiated co flows Michael J. Papageorge
More informationOverview of Reacting Flow
Overview of Reacting Flow Outline Various Applications Overview of available reacting flow models Latest additions Example Cases Summary Reacting Flows Applications in STARCCM+ Chemical Process Industry
More informationA REDUCEDORDER METHANEAIR COMBUSTION MECHANISM THAT SATISFIES THE DIFFERENTIAL ENTROPY INEQUALITY
THE PUBLISHING HOUSE PROCEEDINGS OF THE ROMANIAN ACADEMY, Series A, OF THE ROMANIAN ACADEMY Special Issue/2018, pp. 285 290 A REDUCEDORDER METHANEAIR COMBUSTION MECHANISM THAT SATISFIES THE DIFFERENTIAL
More informationMULTIPHASE FLOW MODELLING
MULTIPHASE FLOW MODELLING 1 Introduction 2 Outline Multiphase Flow Modeling Discrete phase model Eulerian model Mixture model Volumeoffluid model Reacting Flow Modeling Eddy dissipation model Nonpremixed,
More informationInternational Journal of Scientific & Engineering Research, Volume 6, Issue 5, May ISSN
International Journal of Scientific & Engineering Research, Volume 6, Issue 5, May2015 28 CFD BASED HEAT TRANSFER ANALYSIS OF SOLAR AIR HEATER DUCT PROVIDED WITH ARTIFICIAL ROUGHNESS Vivek Rao, Dr. Ajay
More informationMathematical Modelling of Health & Safety Related Flows Future Direction
Mathematical Modelling of Health & Safety Related Flows Future Direction Stefan Ledin Health & Safety Laboratory, UK www.hsl.gov.uk www.hsl.gov.uk Content Where is modelling used? Real Life Scenarios Flows
More informationCHAPTER 7 NUMERICAL MODELLING OF A SPIRAL HEAT EXCHANGER USING CFD TECHNIQUE
CHAPTER 7 NUMERICAL MODELLING OF A SPIRAL HEAT EXCHANGER USING CFD TECHNIQUE In this chapter, the governing equations for the proposed numerical model with discretisation methods are presented. Spiral
More informationARRHENIUS LAW MODIFICATION FOR TURBULENT COMBUSTION MODELING
ARRHENIUS LAW MODIFICATION FOR TURBULENT COMBUSTION MODELING M. Javadi, M. Moghiman, A. Zamani Department of mechanical engineering, Ferdowsi University Mashhad, Iran, P.O.Box: 917751111 Mohammad.Javadi@gmail.com
More informationPublication 97/2. An Introduction to Turbulence Models. Lars Davidson, lada
ublication 97/ An ntroduction to Turbulence Models Lars Davidson http://www.tfd.chalmers.se/ lada Department of Thermo and Fluid Dynamics CHALMERS UNVERSTY OF TECHNOLOGY Göteborg Sweden November 3 Nomenclature
More informationMasters in Mechanical Engineering. Problems of incompressible viscous flow. 2µ dx y(y h)+ U h y 0 < y < h,
Masters in Mechanical Engineering Problems of incompressible viscous flow 1. Consider the laminar Couette flow between two infinite flat plates (lower plate (y = 0) with no velocity and top plate (y =
More informationDivergence free synthetic eddy method for embedded LES inflow boundary condition
R. Poletto*, A. Revell, T. Craft, N. Jarrin for embedded LES inflow boundary condition University TSFP Ottawa 2831/07/2011 *email: ruggero.poletto@postgrad.manchester.ac.uk 1 / 19 SLIDES OVERVIEW 1 Introduction
More informationIMPROVEMENT OF CFD MODELS OF TUNNEL FIRE DEVELOPMENT BASED ON EXPERIMENTAL DATA
Vidakovi}, B. M., et al.: Improvement of CFD Models of Tunnel Fire Development S705 IMPROVEMENT OF CFD MODELS OF TUNNEL FIRE DEVELOPMENT BASED ON EXPERIMENTAL DATA by Barbara M. VIDAKOVI] a and Miloš J.
More information