0 Replies Latest reply on Jun 20, 2018 5:49 PM by Eric Fleischer

    In Thermal simulation, is an empty volume treated as air, vacuum, or something else?

    Eric Fleischer

      For instance, if I am simulating heat loss of a liquid in a closed container, do I need to create a "solid" volume to fill the space between the liquid surface and the underside of the lid, or do I just leave it as a void?  Should I also model a volume of air outside the container, or just apply free convection to the external surfaces?

       

      Related: if I want to define a volume as vacuum, do I leave it as a void, or fill the volume with a "solid" with 1e-15 (seems to be the lowest accepted value) for density and conductivity?