7 Replies Latest reply on Jun 11, 2014 4:45 PM by Jared Conway

    Vacuum

    Nuno Moita

      Hi,

       

      Is it possible to set a volume in vacuum in SW FlowSimulation? If yes, how can I do it ?

       

      best regards!

       


        • Re: Vacuum
          Jared Conway

          what do you mean "set a vacuum"?

          what is the actual application?

           

          in general, if you look at the technical reference and also the solidworks kb that you'll see in flow simulation it requires the fluid to act as a continuum, in a vacuum that isn't always the case so you may not be able do this with flow. depending on your application.

           

          if you're talking about no fluid at all, yes, just run a heat transfer in solids only problem. for example if you are performing a radiation analysis.

            • Re: Vacuum
              Nuno Moita

              Thank you Jared.

               

              I am using conjugate heat and I have a vacuum volume, no fluid, between 2 solids. How can I set that between volume with no fluid at all? Vacuum..

               

              Regards,

               

              Nuno

                • Re: Vacuum
                  Jared Conway

                  so radiation only between the faces? in that vaccum?

                   

                  can you describe the rest of the environment?

                   

                  my suggestion to start is to use heat transfer in the solids only and then you have solid and radiation

                    • Re: Vacuum
                      Nuno Moita

                      Hi Jared,

                       

                      Thank you for your help, again.

                       

                      example.JPG

                      In the picture above the condition are:

                       

                      1 - Air flow (external flow)

                      2 - No fluid (vacuum)

                      3 - Solid Material, the heat source

                      4 - Solid wall (glass)

                      5 - Another solid wall (Steel, for eg).

                       

                      How can I set the 2 as vacuum, no fluid?

                       

                      Best regards,

                       

                      Nuno

                        • Re: Vacuum
                          Jared Conway

                          what heat transfer happens in 2?

                            • Re: Vacuum
                              Nuno Moita

                              That's what I want to check with the condition.

                               

                              Probably as pure vacuum does not exist I can set a pressure below 1 atm.

                                • Re: Vacuum
                                  Jared Conway

                                  you can't "check" with flow simulation as vacuum is not supported

                                  if you wish to apply a fluid subdomain with low pressure, you can try that but it may invalidate the fundamentals of flow simulation, please see the technical reference and solidworks kb for more information on that

                                   

                                  if radiation is the main source of heat transfer, you could fill that area with something, and then make it transparent to radiation so it would go through and not affect the heat transfer