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Vacuum conditions

Hello guys,

I am wondering if there is an option to model vacuum as interstitial medium between two objects within AcuSolve? I tried to cheat and leave the domain empty but I got problem with starting computations what was foreseeable. All other sides are treated as walls with radiation surface option turned on. Any tips how to solve that?

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acupro

What are you trying to solve within the vacuum/void space?

Januzaj

A case when two solid are separated from each other a certain distance and they exchange heat through their external surfaces that are treated in HM as radiative walls. Void fills out the gap between bodies.

Januzaj

hello?

Junta_20361

A case when two solid are separated from each other a certain distance and they exchange heat through their external surfaces that are treated in HM as radiative walls. Void fills out the gap between bodies.

hi Januzaj,
i don't think AcuSolve can model the vacuum as you want.
For your simulation, you can create the model with the air in the gap between 2 solid as usual.
However, please use a very small value for conductivity and high value for specific heat for air material.
in this way, heat energy could only be transfered b/w 2 solids by radiation.
the concept is shown in Acusolve tutorial ACU-T: 3202 Heat Transfer Between Concentric Spheres – P1 Radiation Model.

ydigit

Also you can define the air with properties mentioned above as a type=solid instead of fluid. This will ignore convection in the medium.