https://forums.autodesk.com/t5/cfd-forum/venturitube-inside-a-box/m-p/5879167#M20665 <P>Hello,</P><P>&nbsp;</P><P>i am sitting at a student project and want to use the CFD Programm to verify how i think it ll work out.<BR />I attaced a picture of the construction.<BR />The issue is that i get a lot of very bad,mixed and unrealistic results. F.e flows of the fluid in the direction of the inlet (even for +500itterations)<BR /><BR />Conditions:<BR />Inlet: I can either choose pressure (3bar) or a velocity with no meaningfull results in the end.</P><P>&nbsp;</P><P>Outlet: Always 0bar pressure (i have ambient pressure there).</P><P>&nbsp;</P><P>Advection 5</P><P>Compressible Fluid (nitrogen,variable)</P><P>Automesh and&nbsp;generating a finer mesh with the regulator. Automesh possible reason for bad results?</P><P>Static Solution with 500 itterations</P><P>&nbsp;</P><P>Id say its either the advection or the mesh that is wronge here.</P><P>&nbsp;</P> Tue, 27 Oct 2015 00:13:49 GMT Anonymous 2015-10-27T00:13:49Z