Vacuum conditions

Januzaj
Januzaj Altair Community Member
edited October 2020 in Community Q&A

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? 

 

Tagged:

Answers

  • acupro
    acupro
    Altair Employee
    edited June 2020

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

  • Januzaj
    Januzaj Altair Community Member
    edited June 2020

    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
    Januzaj Altair Community Member
    edited June 2020

    hello?

  • Junta_20361
    Junta_20361 New Altair Community Member
    edited June 2020
    Altair Forum User said:

    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
    ydigit
    Altair Employee
    edited June 2020

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

Categories