COMSOL Multiphysics 4.3a

Transcription

1 COMSOL Multiphysics 4.3a

2 COMSOL Multiphysics 4.3a New 4.3 New4.3 New4.3 COMSOL, COMSOL Multiphysics, COMSOL Desktop, and LiveLink are registered trademarks or trademarks of COMSOL AB. AutoCAD and Inventor are registered trademarks of Autodesk, Inc. LiveLink for AutoCAD and LiveLink for Inventor are not affiliated with, endorsed by, sponsored by, or supported by Autodesk, Inc. and/or any of its affiliates and/or subsidiaries. CATIA is a registered trademark of Dassault Systèmes S.A. or its affiliates or subsidiaries. SolidWorks is a registered trademark of Dassault Systèmes SolidWorks Corporation or its parent, affiliates, or subsidiaries. Creo is a trademark and Pro/ENGINEER is a registered trademark of Parametric Technology Corporation or its subsidiaries in the U.S and/or in other countries. Solid Edge is a registered trademark of Siemens Product Lifecycle Management Software Inc. SpaceClaim is a registered trademark of SpaceClaim Corporation. MATLAB is a registered trademark of The MathWorks, Inc. Excel is a registered trademark of Microsoft Corporation.

3 New Products Nonlinear Structural Materials Module Nonlinear material models for structural mechanics. Elastoplastic, hyperelastic, viscoplastic, and creep material models. Large strain plastic deformation. Pipe Flow Module 1D flow, heat, and mass transport in 2D and 3D pipe networks. Direct coupling between pipe flow and volumetric CFD. Pipe cross-sections, friction models, valves, pumps, elbows, T-junctions. Corrosion Module Corrosion and corrosion protection simulations based on electrochemical principles. Galvanic, pitting, and crevice corrosion. Cathodic protection.

4 Major New Features Geometry and Mesh Faster meshing for imported CAD files and the LiveLink products for CAD. Mesh selections for creating new boundaries and domains for any imported mesh. Electromagnetics AC/DC: 3D rotating machinery and automatic coil excitation. RF: New polar plots for far field in 2D and 3D. Structural Mechanics CFD New nonlinear solver for mechanical contact and highly nonlinear simulations. Load cases for easy setup of multistep simulations. Turbulent mixing for mass transport simulations. Heat Transfer Solar irradiation from latitude, longitude, date, and time. Particle Tracing Brownian force and particle-particle interactions. Secondary emission and sticking probabilities.

5 Nonlinear Structural Materials Module Description: Nonlinear Material Models for Structural Mechanics and MEMS. Add-on to the Structural Mechanics Module or MEMS Module. A few of the listed material models were previously available in the Structural Mechanics and MEMS Modules. Applications: Any structural deformations where deformations are large enough or operating conditions are such, e.g. high temperature, that material nonlinearities become important. Flattening of a pipe with large strain elastoplastic deformation. Animation: Flattening of a pipe (animation in presentation mode). Necking of a metal bar. This example is a classical benchmark for large strain plastic deformation.

6 Nonlinear Structural Materials Module Features & User Interfaces: Elastoplastic Material Models Isotropic, Kinematic, and Perfectly Plastic Hardening Large-strain plasticity, for elastic and hyperelastic materials Orthotropic Hill Plasticity Tresca and von Mises Yield Criterion User-defined Flow Rules Viscoplastic Material Model Anand Creep Material Models Coble, Deviatoric, Garofalo, Nabarro- Herring, Norton, Norton-Bailey, Potential, User-defined, Volumetric, Weertman Hyperelastic Material Models Arruda-Boyce, Money-Rivlin: two, five, and nine parameters, Murnaghan, Neo- Hookean, Ogden, St Venant-Kirchhoff, User-defined

7 Pipe Flow Module Description: Flow, heat, and mass transport in pipe networks. The pipe systems are modeled as geometrical 1D lines or curves embedded in 2D or 3D and are created using the existing drawing tools in COMSOL Multiphysics. Add-on to COMSOL Multiphysics. Applications: Hydraulics Water distribution systems Energy: nuclear, hydropower, geothermal Cooling systems in combustion engines and turbomachinery Heating systems Chemical process industry such as plant distribution systems Oil refinery pipe systems Lubrication Cooling of a plastic mold of a steering wheel including pipe flow in cooling channels. Pipe system for geothermal heating.

8 Pipe Flow Module Features & User Interfaces Seven Physics user interfaces: Pipe Flow, Single Phase Water Hammer Non-Isothermal Pipe Flow Heat Transfer in Pipes Reacting Pipe Flow* Transport of Diluted Species in Pipes* Pipe Acoustics, Transient** *=more advanced user interfaces available when combined with other transport modules **=when combined with the Acoustics Module Bidirectional couplings can be made between pipes and 2D and 3D solid or fluid domains, as well as between flow, heat, and mass applications. Pipe cross-sections, automatic transition between laminar and turbulent flow, surface roughness, and different friction models. Preset options for valves, pumps, elbows, T-junctions. A reactor simulation for synthesis of phtalic anhydride under autothermal conditions using the Pipe Flow Module together with the Chemical Reaction Engineering Module.

9 Corrosion Module Description: Corrosion and corrosion protection simulations based on electrochemical principles. Galvanic, pitting, crevice corrosion, and more. Cathodic protection. Add-on to COMSOL Multiphysics. Applications: Corrosion and corrosion protection of: Off-shore structures such as oil rigs Ships and submarines Civil-engineering structures Chemical process industry equipment Automotive parts Mechanical structures in aerospace applications Galvanic corrosion of a Magnesium Alloy (AE44) - mild steel couple in brine solution (salt water). The electrode material removal is represented with a moving mesh.

10 Corrosion Module Features & User Interfaces: Primary, Secondary, and Tertiary Current Distribution Corrosion and Moving Mesh: Secondary Currents Tertiary Currents, Nernst-Planck Equation Thin shell electrodes Influence of material transport and material concentration on corrosion and corrosion protection including diffusion, migration and fluid flow effects Include effects of heat transfer on material transport and corrosion rates AC impedance simulations

11 Major News in COMSOL Multiphysics 4.3a New Products: LiveLink for Excel : Run COMSOL simulations from Microsoft Excel. Fatigue Module: Mechanical fatigue based on stress or strain evaluations. ECAD Import Module: Import of ECAD layouts with new functionality for easy filtering of cells, nets, and layers. LiveLink for Solid Edge : Bidirectional associativity with Solid Edge. Support for cloud computing with Amazon Elastic Compute Cloud (Amazon EC2 ). Parameter optimization Optimize on geometric dimensions and other parameters. More efficient CFD solvers. Faster multicore and cluster computing.

12 LiveLink for Excel Run COMSOL Multiphysics simulations from an Excel spreadsheet: Adds a COMSOL-specific toolbar to the Excel ribbon for displaying geometry and mesh as well as running a simulation Visualize COMSOL Multiphysics results in Excel. Display and edit only the most important simulation parameters Synchronize or import/export parameters and variables between Excel and COMSOL Multiphysics: Interactive 3D visualizations are presented in a separate dedicated canvas Excel 2007 and 2010 for Windows is supported Excel is a registered trademark of Microsoft Corporation.

13 How Does it Work? Establishes a two-way connection between COMSOL and Excel parameters, variables etc. Excel XLSX-files Excel parameters, variables etc. parameters, variables, results etc. COMSOL Model window

14 Load/Save Data to/from the COMSOL Desktop Load/save data: Parameters Variables Functions

15 COMSOL Tab and Toolbar A COMSOL toolbar is used to interact with the COMSOL Model from Excel Retrieve and update parameters, variables, and functions Compute the model Show results as graphics and import COMSOL images into Excel Extract numerical data to Excel worksheets

16 The COMSOL Model Window The COMSOL Model window Contains the model in memory Shows interactive graphics Gets commands from the COMSOL toolbar

17 Platforms Excel 2007 and Excel 2010 are supported Only Windows is supported Both COMSOL and Excel have 32-bit and 64-bit versions Many users choose to install the 32-bit version of Excel even on 64-bit computers LiveLink for Excel works with any combination of Comsol and Excel

18 Benefits Ease-of-use in organizations that regularly base their data handling on data stored in Excel Use Excel as a customized user interface for (complicated) COMSOL models Allows the combined presentation of inputs and outputs e.g. for reporting

19 Fatigue Module Fatigue = structural damage from repeated loading and unloading. Stress levels aren t providing enough information. Need Fatigue Life Number of load cycles before structural failure. Fatigue is probabilistic statistical methods needed. Add-on to the Structural Mechanics Module. Fatigue Life Plot

20 Available Fatigue Evaluation Methods * Available with the Nonlinear Structural Materials Module

21 ECAD Import Module Import of 2D layouts Automatic conversion of 2D layers into 3D CAD models. Filtering of individual cells, nets, and layers with settings stored on file. Use ECAD data for any type of physics simulation Supported ECAD formats GDS-II ODB++(X) NETEX-G Part of this functionality was previously available in the AC/DC, RF, and MEMS Modules. License holders of these modules will get the ECAD Import Module free of charge until next subscription renewal. Capacitance and inductance extraction for a planar transformer model imported as an ECAD file.

22 LiveLink for Solid Edge Solid Edge is a CAD software provided by Siemens PLM. The LiveLink for Solid Edge offers fully associative integration with Solid Edge for multiphysics simulations involving parametric sweeps and design optimization. Contains the functionality of the CAD Import Module. Corrosion potential of an oil rig structure surrounded by 52 sacrificial anodes Solid Edge is a registered trademark of Siemens Product Lifecycle Management Software Inc.

23 Cloud Computing The new user interfaces for Remote Access. Run simulations on Amazon Elastic Compute Cloud (Amazon EC2 ). Access high-end hardware on a pay-peruse basis. Types of computations: Multicore Computing on one virtual computer with lots of RAM. Cluster Sweep for parallel parametric studies. Cluster Computing for large distributed memory simulations. New remote access tools: Optimized data transfer to minimize upload/download of data. Dial-back to on-premise license manager. Run from GUI or batch mode. Available for any COMSOL Multiphysics user with a Floating Network License. Amazon EC2 and Amazon Elastic Compute Cloud are trademarks of Amazon Web Services, LLC or its affiliates.

24 Cloud Computing Setup Local desktop computer Data SSH Tunnel Port forwarding License info The Cloud Local license server

25 Cloud Computing Setup Open an Amazon AWS Account Install either PuTTY or use local linux installation Start an, or several Amazon Cloud Entity(ies) dependent on the size/type of job High Memory High CPU HPC (both of the above) Upload local installation(typically once, but has to include all files except from doc and model library) Run job, as you would do on your local cluster Terminate when finished.

26 Cloud computing setup Tips and tricks Read the manual(!) Use StarCluster-software from MIT to run the Amazon cluster entities (Free) star.mit.edu/cluster/ Test with free usage tier before running your BIG model.(max 500MB of memory..)

27 Swifter Parallel Computing More efficient parallel computing for both shared-memory/multicore and distributed computing. Multicore computing: Greatly improved handling of constraint boundary conditions such as fixed temperature, electric potential, and displacement speeds up computations for most physics. Performance increase is thanks to new constraint elimination algorithms. Distributed computing: Solvers have been optimized by the introduction of a very efficient sparse matrix reordering algorithm for direct solvers. Communication for matrix-vector data has been optimized. An evanescent-mode cavity filter.

28 Parameter Optimization Gradient-free parameter optimization can now be applied due to three new optimization methods: Nelder-Mead. Coordinate Search. Monte Carlo. Optimize with respect to one or more geometric dimensions: for a CAD model created directly with COMSOL Multiphysics. for a model from a CAD package linked through any of the LiveLink products. Parameter optimization is not limited to geometric dimensions but can be applied to any parameters of a model. Tunable MEMS capacitor where a target capacitance of 0.1 pf is found by optimizing the distance between capacitor plates.

29 Group Boundaries Based on Continuous Tangent Select and group adjacent boundaries with continuous tangents between. Minimizes the number of mouse clicks for selecting adjacent boundaries. New cylinder selection. Selection of boundaries in this exhaust manifold is made easier by the new continuous tangent boundary selection feature.

30 Logical Expression-based Mesh Selection Based on Coordinate Variables: Use the x, y, and z coordinate variables in a logical expression, such as (y<-40)&&(z>2.5) to partition an imported mesh into new domains or boundaries. Visualization of coordinate box and ball. Partitioning a mesh based on a logical expression in terms of coordinate variables x, y, and z.

31 Geometry Modeling: Import of Contour Plots Contour plots can now be exported on the Sectionwise data format: allows them to be imported and reused as an interpolation curve in a geometry model this enables contour plots to be part of a 2D or 3D geometry model 2D curves can be extruded, revolved, or swept into 3D geometry objects. An isothermal contour line is imported as an interpolation curve, extruded, and used to partition this geometry of a power transistor and circuit board.

32 Tailored Mesh Settings for CFD Automatic corner refinement. Splitting at sharp corners instead of trimming. Robust and accurate for larger geometry models. Integrated with multigrid solver for CFD. A boundary layer mesh with automatic corner refinement and new handling of sharp edges.

33 FLUID

34 One-Way Coupled Fluid-Structure Interaction (FSI) Solving for One-way Coupled FSI is more efficient when there is no coupling from the structure back on to the fluid (i.e., no flexing back ) New study types for FSI: Stationary, One-way Coupled Time-dependent, One-way Coupled Solves for the fluid first, then for the structure. Other physics can be included in either or both study steps. Requires Structural Mechanics or MEMS Module.

35 More Robust and Easier-to-use Pseudo Time- Step Solver for Stationary CFD and FSI Pseudo-time stepping is used for robust convergence towards steadystate solution: Available for all stationary flow physics user interfaces and FSI. Faster solutions for simple models. More robust behavior for large models. CFL number controlled by a new PID regulator: Instead of built-in expression. Much easier to tune. Pseudo time-derivative removed from continuity equation: Removes models that resonate. More robust.

36 Much Improved Default Solver for CFD Implemented for all flow interfaces. Reduced memory requirements for large models. More automation and less manual tuning. Mesh building triggered when retrieving default solvers: This shows when default solvers take longer. Direct solver for small models: Small is 100,000 elements in 3D and 300,000 elements in 2D Default geometric multigrid (GMG) solver automatically adjusted based on the number of mesh elements. Additional multigrid levels are automatically added for large models: First additional level at 600,000 elements Maximum of four levels including the finest mesh for first order elements. Additional levels for higher-order elements.

37 Reacting Flow User Interface New Reacting Flow User Interface for Laminar and Turbulent Mass Transport: Combination of Laminar or Turbulent Singlephase Flow with Transport of Concentrated Species. Includes turbulent wall functions for mass transport, turbulent reaction modeling, and reaction kinetics. Built-in algebraic models automatically computes the Schmidt number. Also features turbulent low-reynolds mass transport for high Schmidt number (for reactions in liquids). Based on the so called Eddy Dissipation Concept (EDC).

38 Moist Air Fluid Model Heat Transfer in Fluids now contains a new Moist air fluid type: Contains thermodynamics properties of unsaturated humid air. Dedicated postprocessing variables. Verify if the saturation level has been reached during the simulation. Available in the Heat Transfer Module

39 MECHANICAL

40 Load Cases for Heat Transfer Loads and constraints for heat transfer is now available using the same load and constraint group concept as in the Structural Mechanics Module. Use load groups for heat sources and heat fluxes. Use constraint groups for temperature conditions.

41 New Hyperelastic Material Models Nonlinear Structural Materials Module comes with three new hyperelastic material models: Yeoh Varga: Nearly incompressible, nonlinear elastic materials such as rubber. Blatz-Ko: Highly compressible materials such as foam rubber.

42 Acoustics Module New tutorial model of the Brüel & Kjær 4134 condenser microphone: Compares the simulated sensitivity level to measurements performed on an actual microphone. New Boundary layer approximation fluid model for pressure acoustics: allows for simulation of the thermal and viscous losses at boundaries of a duct as a bulk loss (an equivalent fluid). The viscous characteristic length can now be entered directly in the Biot equivalent fluid models. The Thermoacoustics user interface now features a heat source option which is used for optoacoustics and acoustic heat exchangers. Model geometry and measurement courtesy of Brüel & Kjær Sound & Vibration Measurement A/S, Nærum, Denmark.

43 CHEMICAL

44 Film Resistance Used for resistance modeling in electrochemical applications: Passivation. Growing oxide layers etc. Introduced for all boundary conditions that model an interface between an electrolyte and an electrode. Available in the Corrosion, Electrodeposition, and Batteries & Fuel Cells Modules Equation New Section (No film resistance is default)

45 ELECTRICAL

46 RF Module A new general 2.5D formulation for waves Use for disk antenna modeling, accurate scattering modeling, laser (Gaussian) beam models, and cavity model analysis for accelerators, for example. Dedicated port for periodic structures in 2D models. Easier to model excitation of Floquet periodic structures and includes automatic setup of diffraction orders. Support for volumetric currents Set a volumetric external current density in domains.

47 MULTIPURPOSE

48 Particle Tracing Module New boundary conditions are available for the following types of particle reflections: Diffuse reflection. General reflection, where you can supply your own expressions for the particle velocity after collisions with a wall. Pass through, which can be used on interior boundaries in conjunction with a sticking probability or expression. New variables have been added for the particle release time, particle stop time, and particle status. Now possible to specify a logical expression for the particle to include in the Filter subnode for the Particle Trajectories plot.