Re: how to define a force normal to a surface

Fri, 12 Mar 2010 06:28:56 +0000

Hi

depending on the module you are in, but you have the option to work in the surface local coordinates with a normal force/pressure and not only the x-y coordinae ones. The same you have also follower pressure I believe see smref.pdf (I have no access just now to COMSOL)

good luck
Ivar

how to define a force normal to a surface

Thu, 11 Mar 2010 12:36:48 +0000

Hi,

the problem is:
I want to calculate the deformation of a hollow volume when the air inside heats up, because of the thermal expansion of the gas. Instead of going to multiphysics I think it would be easier just to calculate the final pressure and to add the internal pressure as the load.

The problem is that the volume has a shape that is not linear, so it does not help me to add to all boundaries the force (or pressure) divided in the Fx and Fy components, and to model it using polar variables also doesn't, since the shape is not circular. How do I define a force that is constant and always in the direction of the normal to the surface?

Thank you

Piergiorgio Antonini

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Re: how to define a force normal to a surface

how to define a force normal to a surface