Implementing the Weak Form in COMSOL Multiphysics _ COMSOL Blog
Overview to COMSOL Multiphysics -...
Transcript of Overview to COMSOL Multiphysics -...
Overview to COMSOL Multiphysics
Jukka Tarvo
© 2011 COMSOL. All rights reserved.
• Headquarter in Stockholm.
• 16 offices in Europe, India and USA.
• 250 employees.
• 14 000 licenses och 60 000 users.
World leader in multiphysics simulations
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Answer four questions: – What is the product line offered by COMSOL
– What is a multiphysics analysis?
– What is the general workflow in COMSOL Multiphysics?
– What are the most notable benefits of COMSOL Multiphysics?
Goals of This Presentation
COMSOL Multiphysics 4.2a Product Line
LiveLink™ for MATLAB®
• LiveLink for MATLAB allows you to integrate COMSOL Multiphysics with MATLAB to extend your modeling with scripting and to build your own applications that incorporate your COMSOL Multiphysics models.
MATLAB is a registered trademark of The MathWorks, Inc.
CAD Import Module and LiveLink™ for CAD 4.2a
LiveLink™ for AutoCAD®, LiveLink™ for Creo™ Parametric, LiveLink™ for Inventor®, LiveLink™ for Pro/ENGINEER®, LiveLink™ for SolidWorks®, LiveLink™ for SpaceClaim®
File Import: Supported Formats
* Needs license for File Import for CATIA V5
Format Extension Version
Parasolid .x_t, .x_b up to V22
SAT (ACIS) .sat, .sab up to R21
STEP .step, .stp AP203, AP214
IGES .igs, .iges up to 5.3
Autodesk Inventor part .ipt 6 – 11, 2008 – 2011
Autodesk Inventor
assembly
.iam 11, 2008 – 2011
Pro/ENGINEER .prt, .asm 16 to Wildfire 5.0
SolidWorks .sldprt, .sldasm 98-2011
CATIA V5* .CATPart, .CATProduct R6 to R20
CAD Repair and Defeaturing Tools
• Parasolid-based CAD Geometry Repair and Defeaturing tools ease meshing of large CAD parts and assemblies
Cap Faces
Virtual Geometry Operations
Material Library
• Data for more than 2500 materials.
• A given material entry store data for up
to 24 different properties by default –
can be extended upon by user.
• Focus on elastic and thermal properties. Each of these material properties is described as a function of some variable, typically temperature T.
• In all, the Material Library contains a total of almost 20,000 property functions (material curves).
• Search Feature: look for materials by name, UNS number, or DIN number.
Anywhere you can type a number …
you can type an equation
• Or an interpolation function …
• And it can depend on anything known in your problem
• Example: Temperature-dependant thermal conductivity of water:
Add Your Own Equations to COMSOL’s
Don’t see what you need?
Add your own equation
• ODE’s
• PDE’s
• Weak form PDE’s
Just type them in
• No Recompiling
• No Programming
Support for High-Performance Computing
Multi-Core Parallel Computing
• No Extra Charge
• Fully Supported on all Licenses
Cluster Parallel Computing
• No Extra Charge
• Requires Floating Network License
• Freq Sweep / Parametric Sweep
• Distributed Single Large Problem
Solvers: Direct / Iterative
Fully Coupled / Segregated
What Is a Multiphysics Analysis?
• Multiphysics is the combination of several physics phenomena when describing a process or system
• The physics can be – Uncoupled
– One-way coupled (a.k.a. weakly coupled)
– Strongly coupled
• COMSOL Multiphysics tackles the situations where those physics can be modeled primarily by – PDEs
– ODEs
– Algebraic equations
• Select your Physics – Tell the software which physical phenomena you want to include in the analysis
• Draw – Use the built-in CAD tools or import from external CAD software
• Specify your Physics – Specify materials, sources and sinks, etc. – Specify boundary conditions
• Mesh – Create structured or unstructured meshes
• Solve – Stationary, transient, eigenfrequency, and parametric analyses – Direct and iterative solvers
• Postprocess the Results – Visualize your results, get values of solution at points of interest – Compute functions of the solution like integrals, fluxes, forces, etc. – Generate reports to share results with colleagues
A Complete FEA Simulation Environment, A Single Workflow
COMSOL Multiphysics Workflow
Mesh
Micromixer www.comsol.com/showroom/gallery/320
Results
Definitions, Materials, and Physics
Study
Geometry
COMSOL Multiphysics User Interface
• Multiphysics – Coupled phenomena (strongly or weakly coupled)
– No limitation on the number of physics involved
– Couplings not limited to pre-implemented cases
• Single physics – A single interface for all physics
• Extreme flexibility with no need for user-subroutines, you can – Create your own multiphysics couplings, with no programming needed
– Type in nonlinear expressions, look-up tables, or function calls
– Manipulate ready-made equations or add your own (PDEs, ODEs, and algebraic equations)
– Parameterize anything (including the geometry)
Most Notable Benefits of COMSOL Multiphysics
The COMSOL benefits – in the words of the users
Energy savings of 50 TWH per year.
“Through techniques such as arc
straightening, acoustic excitation
enables us to greatly enhance the
efficiency of HID lamps, and save energy
on a global scale. A simple estimate
offers potential energy savings of 50
TWH per year.”
Company: OSRAM SYLVANIA
Industry: Lighting
Application: High-Intensity Discharge Lamps
Simulation: Electric currents, acoustics, heat
transfer, fluid flow
http://www.comsol.com/stories/osram_sylvania_discharge_lighting/
Thomas Dreeben and Jo Olsen,
OSRAM SYLVANIA
COMSOL saved several months of development time.
“It’s really about fewer prototypes; fewer
design variations, which translates to
shorter development time; and reduced
R&D and manufacturing costs.
COMSOL saved several months of
development time by avoiding the need
for more experiments.” Waters simulation team (left to right) Bernard Bunner,
Markus Wanninger, and Uwe Neue.
Company: Waters
Industry: Chemical
Application: High Performance Liquid Chromotography
Simulation: Microfluidics and thermal
http://www.comsol.com/stories/waters_corp_hplc_systems/
Cooling of The Largest Magnet in the World at CERN cutting design cycle time by 90%.
“I can now design the cooling
tubes for a superconducting
magnet in a week or so, work
that previously took two to
three months.”
Company: CEA
Industry: Magnetics
Application: Superconducting Magnets
Simulation: Electromagnetics and Cooling
http://www.comsol.com/stories/cern_cooling_largest_magnet/
Dr. Bertrand Baudouy
is a research scientist
at the Accelerator,
Cryogenics and
Magnetism Division of
CEA (the French
Atomic Energy
Commission).
Fuel savings of up to 15%.
GE plans to make use of the energy
generated while dynamic breaking in
their hybrid locomotives to achieve fuel
savings of up to 15%. Michael Vallance
of GE Global Research is simulating the
sodium metal-chloride batteries that will
drive GE’s hybrid locomotives to enable
and even increase these savings.
Company: General Electric Global R&D
Industry: Transportation
Application: Hybrid Locomotives
Simulation: Electrochemistry, ion transport,
heat transfer
http://www.comsol.com/stories/general_electric_modeling_train_batteries/