Learning Forum

[alex9kon]

Hello. I'm trying to model RF-heated water-cooled solid body in vacuum, but I don't know how to model vacuum vessel. I tried to use solution from there:

 https://innovationspace.ansys.com/knowledge/forums/topic/vacuum-thermal-modeling-in-ansys-icepak/

but it's probably relevant for standalone Icepak release (since I can't find options to model fluid box with fixed convection speed). With just using vacuum-like material properties for region abound solid body and enabled Flow calculation (which, I believe, is necessary for cooling simulation), solution can't converge. Is there something else I can use?

[Pdev]

Hi ,

Thanks for reaching out. For vacuum modeling you will need Create “vacuum” fluid material of very low thermal diffusivity α = k/ ρ cp (for either
steady state or transient analyses)
− Very low thermal conductivity, k
− Very high specify heat cp and density ρ

Hope this helps. 

Best,
Pdev