Multi-Physics & Analysis

Computational Modelling of Multiphysics Processes

Workshop Description

The objective of this workshop is to focus upon the status of multiphysics simulation technology and what comprises its challenges. It will cover:

• Overview of challenges of multi-physics
- Contemporary applications
- Levels of coupling
- Survey of commercial CAE analysis technologies
- Discussion of benchmarks

• Multi-physics case-studies – formulation and routes to solution

• Road-map for the future - key problems:
- Characterization of problems
- Physics vs. Levels of coupling
- Software capabilities – gaps and limitations

Presentations

XML/STEP/OMG Technologies to Facilitate Generic Coupling of Different Analysis Codes
C. Armstrong, QUB, U.K.

• 100’s commercial codes available (FEA, FV, BEM, DEM)
• STEP AP209 specification – carefully planned
• Describes structures, fields, changes of state
• PDM enabled and feedback to design compliant
• Lightweight Specification for interoperable EA enterprise applications
• May be combined with an OMG equivalent specification for CAE services

Computational Modelling of Multi-physics Processes: Case studies

The workshop challenges.

Three issues to address:

1. to consider how you would formulate a model to simulate the process from scratch without the constraints of existing computational modelling software technologies
2. simplify the formulation to address the problem from one or more perspectives with existing commercial software software technologies that group members are familiar with
3. evaluate what software technology would need to be developed so that the problem can be addressed comprehensively

Multiphysics Simulation & Integration - Applications to Casting Analysis
M.Chiumenti, CIMNE, Spain

• Multi-physics Analysis
• filling analysis
• solidification analysis
• solution strategy
• Casting Analysis
• FIAT console
• SEAT break part

Overview of the challenges of MULTI-PHYSICS
Mark Cross, Avril Slone, Centre for Numerical Modelling and Process Analysis, University of Greenwich, London, U.K. - Eugenio Onate, Pere-Andreu Ubach, CIMNE, UPC, Barcelona, Spain

Most CAE analysis software tools based upon single discipline:

• CFD (fluid flow, heat transfer, combustion)
• CSM (structures, dynamics, contact, heat transfer)
• CEM (electro-magnetics)
• Acoustics

What of their interactions?

• - mostly we cheat or ignore them

Challenges of Multi-Physics Coupling in a Commercial FE Code
David Ellis, Idac Ltd, London, U.K
This presentation will illustrate the capabilities of the ANSYS® program for solving Multiphysics Coupled Field solutions and describe the challenges faced in solving these problems as well as offering some advice in tackling these challenging physics simulations.

Applications on Fluid-Structure interaction
Arnau Folch, Centro Internacional Métodos Numéricos en Ingeniería (CIMNE), Spain

1. Overview of multiphysics

• Computational Strategies
• Monolithic vs. partitioned schemmes. Who wins the match ?

2. Fluid-Structure interaction

• General problem
• Solution Strategies for partitioned schemmes
• ALE formulation

3. Applications

• Aerodynamic coefficients of a large span suspended bridge
• Launching of a missile
• Caldera-forming volcanic eruptions

LIMITATIONS OF THE FINITE ELEMENT MODELLING OF TRAUMATIC INJURY
Mike Neale, Biomechanics and Injury Prevention Group, TRL Limited, U.K.

• Brief background to TRL Limited
• Detail limitations of modelling human biological system
• Multi-physics modelling problems

FREE SURFACE AND MEMBRANE-FLUID APPLICATIONS
Pere-Andreu Ubach, Eugenio Oñate CIMNE
Acknowledgments: Dr. Julio Garcia COMPASS IS, Lara Pellegrini