Scientific Computing LabIntroduction to

COMSOL - Multiphysics

Dheevatsa Mudigere

Institut fürInformatik

Scientific Computingin

Computer Science

COMSOL - Multiphysics

• COMSOL Multi-physics (formerly FEMLAB) is a commercial finite element analysis and solver package for various physics and engineering applications.

Example - 2D steady-state thermal analysis

• Domain - 0.6×1.0 meters.

• Boundary conditions:

– The left boundary is insulated.

– The lower boundary is kept at 100 °C.

– The upper and right boundaries are convecting to 0 °C with a heat transfer coefficient of 750 W/(m2°C).

• Material Properties

– Thermal conductivity is 52 W/(m °C).

– Density, ρ - 7850 kg/m3

Starting COMSOL

/usr/local/applic/bin/comsol

Starting COMSOL

Geometric Modeling

Draw> Specify Objects>Rectangle

Physics Settings - Boundary Conditions

Physics> Boundary Settings>

Physics Settings - Boundary Conditions

Physics> Boundary Settings>

Physics Settings - Boundary Conditions

Physics> Boundary Settings>

Physics Settings – Sub-domain settings

Physics> Subdomain Settings>

Mesh Generation

Intialize Mesh>

Solving

Solve>

Post-processing

Postprocessing>