3 Replies Latest reply on Feb 1, 2013 8:01 PM by Jared Conway

    The Fluid Volume is 0 m^3

    Felix Fallenstein

      I have created a twist drill with cooling chanels and flute. Around this (part 1) I have crated a hole (part 2). The hole's opening is closed, so that the drill is completely surrounded by the hole. The drill is a little bigger in diameter than the hole and also a little longer than the hole, so that there are intersections everywhere.

       

      I definitely have two closed "empty" volumes between the drill and the hole (the cooling channels an the flutes, which are connected as pairs. One channel with one flute).

       

      But when I run the "check geometry" it says: The fluid volume is 0 m^3, which is definitely wrong. It doe's not produce any errors or hints.

       

      What could be the reason?

          • Re: The Fluid Volume is 0 m^3
            Rich Bayless

            Hello,

             

            From the picture and your description, you have a solid hole.  Flo Sim works around solids by adding fluid in the 'empty areas'.

             

            Make a large solid, then use Cut/Extrude to cut a hole in the solid.  Add two lids on either end of the hole, with the drill inside of the empty hole.  Then add a Fluid Domain by selecting the inside surface of one of the lids.

             

            A solid hole won't work,  but a hole in a solid will work.

             

            Rich.

            • Re: The Fluid Volume is 0 m^3
              Jared Conway

              Felix, do you have any boundary conditions applied yet? What type of analysis are you planning on running? Internal? Where will the boundary conditions be applied? Will you be including cavities without flow conditions?

               

              If you save your assembly as a part, are you able to merge the bodies all together? If you draw a huge solid cube overtop of all the components are you able to use combine subtract to remove your assembly bodies from the cube? If you can't do this, Flow Simulation won't be able to either which is the equivalent to the fluid geometry failing to be generated.

               

              Based on the error message, my guess is that the interferences are causing trouble. Try using the cavity feature to trim one component with another and see if that helps.