midas NFX 2015 R1 Release Note
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1 Total Solution for True Analysis-driven Design midas NFX 2015 R1 Release Note 1
2 midas NFX R E L E A S E N O T E R 1 Accurate whenever you Need Be more efficient by focusing on the right details and get Accurate results This document present the new features and improvements of midas NFX
3 Pre/Post Processor < Convenient selection of inner faces> This function facilitates the selection of wanted inner face among numerous overlapped faces. It hides an appointed number of faces, starting from the outermost surface. < Vector visualization on the cross section> Vector results can be directly outputted on any cross-section. The selection and generation of cross section is similar to the previous version. cross-section vector activation window inner face selection window example of cross-section vector visualization Original model 1 st round Peel Down result Cross-section vector definition window < Others> Default settings are optimized for better convenience in both structural and CFD analyses. Users can set the most used menu settings in one single click. Simplify the method to check intermediate results during analysis. Add read result file again to result import function. It eliminates the inconvenience to specify the file path. 3
4 < MBS Rigid Body Dynamics Improvements> The new solver improves stability and speed of MBS(Multi-Body System) Rigid Body Dynamics analysis. For completely rigid model which contains no elastic body, a new kinematic constraint equation is used. This improves the calculation speed from numbers to dozens of times. < Rigid Body Load > Loads can be applied to rigid parts. To apply rigid body load, decide the target part first and generate markers at the locations to be loaded. Then follow the instruction below for load definition and generation. Conv. EXP New MBD TIME Analysis time comparison for rigid model (12 parts, 10 constrains, 0.01s time interval, 300 steps) Rigid body load definition window 4
5 < Clustering option for radiation thermal load> Clustering function is added to blackbody radiation load in structural thermal analysis. This improves the memory performance and computation speed. < Joule Heating (Structural Analysis) > Joule heating function is developed for structural thermal analysis, to take into account the heat generated by electricity. electric conductivity electric loading Radiation load setting window Clustering definition for cavity radiation MEMORY TIME The shorter the better. Driving voltage: 5V Ground R2 clstr=1 clstr=3 clstr=10 clstr=20 Performance comparison according to cluster size Joule heating applied model 5
6 < Contact Function Enhancement> Option is added to improve the convergence for model with contact discontinuity. Gradually modifying the normal direction of the contact surface, the analysis becomes more steady. This option is applicable when general contacts are used in geometrically nonlinear analysis. < Nonlinear Elastic Material Model > Nonlinear elastic material model is added. For this model, load deformation relationship is completely nonlinear; plasticity does not happen. Materials like foam, that goes back to its original shape once unloaded, can be modeled. nonlinear elastic material model nonlinear elastic function Discontinuity modification option surface of discontinuity 6
7 <Generation of thermal load from external data > Thermal load sets can be created from other software s results or field measurements. Generated load types include temperature and convective condition. Enter the coordinates of the interpolation points, and the inputted thermal load can be used in heat transfer analysis. < 1-way FSI > FSI(Fluid Structure Interaction) This function provides a convenient way for fluid and structural analyses. Fluid analysis results, such as pressures or temperatures on certain faces, can be directly transferred to structural analysis. 1-way FSI Create Thermal Load from Results FSI interface definition window FSI analysis case definition window 7
8 < Surface Tension > Fluid analysis can take into account surface tension and contact angle. Behavior of the fluid at the surface can be precisely investigated. < PCB (Printed Circuit Board) model > PCB model easily simulates the thermal conductivity of laminated PCB board. Thermal conductivities in the thickness direction and the planar direction are calculated from the inputted values through the PCB model. surface tension and contact angle during slot coating Surface tension definition window temperature calculation considering copper volume in each PCB layer Contact angle definition window PCB definition window 8
9 < Mixing Plane Model> When fluid flows in the axial direction of the cylindrical coordinate system, flow quantities in the tangential directions are averaged in a mixing-plane interface. This function removes the wake effects in the MRF (Moving Reference Frame) method. < Overset Mesh> The new overset mesh feature allow 2 mesh sets to overlap together to allow more possibilities of simulation of any moving object inside the flow. Overlapping Mesh Sets MRF result MRF + Mixing Plane Interface result Pressure results of CFD analysis using overset mesh sets Mixing Plane Interface definition window Setting Window for overset mesh 9
10 < Thermal Resistance Model> < DO(Discrete Ordinate) Radiation> This new thermal resistance model allows the ca lculation of the temperature by inputting directl With DO Radiation, calculation of radiation which includes partial diffusion is possible. y the Thermal resistance model values θ jb, θ jc Radiation through opaque or semitransparent which are reflecting the thermal conductivity in walls can be both considered. semi-conductor chip equipment. 2 nd order thermal resistance model and network resistance model are both supported. Thermal results using thermal resistance model Temperature results after analysis considering DO radiation θ jc θ jb Thermal resistance model Scheme Radiation Wall Setting Window (Boundary) Input window for thermal resistance part Setting window for Thermal resistance block Radiation Wall Setting Window (Internal) 10
11 < Particle Analysis> < Compressible > This feature creates particles that can create The compressible fluid solver has been drag in the fluid, collision with the walls and are enhanced to calculate shock waves in submitted to gravity. Particles are not compressible fluid problems. interacting between each other. The 1-way method creates particules that cannot interact with the fluid. The 2-way method creates particles that interact with the fluid. Peripheral speed of the airfoil transonic zone as interpreted by compressible flow solver Results of Particle Analysis (Particle Trajectories) Particle Analysis Results (Particle Position) Density based compressible fluid solver setting window Particle Properties Setting Window Particle Distribution Setting Window 11
12 < 1-D Pipe Element > Complex pipe systems and multiple nozzles can be simulated using 1D elements. This kind of simplification allows for a huge gain of efficiency. This feature can be used in heat exchangers and systems using multiple tubes. 속도분포 압력분포 1-D Pipe Model Analysis Results Replacement 복잡한배관 of complex 1-D 요소로치환 pipe with 1-D Element inlet pressure convection heat exchange outlet temp connection reservoir flux connection flow coupling 1-D Pipe Model Example 1-D Pipe models pipe types Complex multi-nozzle 복잡한다중노즐 system replaced 1-D요소로치환 by 1-D pipe elements 1-D Pipe Model Example 12
13 < Joule Heating(Fluid Analysis) > This analysis is used to analyze the heat generated by the flow of current inside a conductor. Joule Heating can be used in all kind of electric equipment to analyze the influence of heat generated byelectric cables. 결과 Result: : 온도Temp. 컨투어Contour Result: 결과 : 최대 Max 온도temperature 이론치 midas NFX F Software Theoretical value midas Joule NFX heating 전기발열 (Joule results heating) are similar 해석기능은 to 신뢰할만한 theory 것으로판단됨 Results of Joule Heating Joule heat Generation Analysis Setting Window 13
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