Modelling Air as Solid Body for Optistruct/Radioss
Hi everyone,
I want to model air inside a metal box in Hypermesh and would like to see the pressure on the inner surface of the box due the thermal expansion of the air inside. I have options to use Optistruct and Radioss to run it. I would like to model the air as a solid/shell mesh, as a idea gas. So what material card do I have to use for air, so that I can deifne is as an Ideal gas and what property card?
thanking you all.
regards,
Debarshi
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Thanks for the reply. In optistruct, what material card do I need to use? And in Radioss, will 'RD-E: 4300 Perfect Gas Modeling with Polynomial EOS' example help?
Altair EmployeeIn OS very simplified you will use an isotropic material MAT1, with alpha as coeff thermal expansion
In OptiStruct you can use psolid and assign a material with air properties.
For RADIOSS you have more options, including material hydro. You could use SPH to model the particles for example.
There are a few examples in the documentation of RD using sph or ALE.