Okay, I'm somewhat confused on the boundry conditions requirements for even the simplest of fluid flow analysis,
Lets say I've got the following model - One input of compressed air and two open ends of the pipe its going into. Like this.
So from what I can make out i'd do the following constraints:
1) Inlet / Outlet at the Open Start end of the pipe and exclude surface from boundry conditions.
2) Inlet / Outlet at the Open End of the pipe and exclude surface from boundry conditions.
3) Inlet / Outlet at the Air Input along with a perscribed flow of 129 in/sec in the correct direction (external fan just doesn't seem to work well at all) and exlude surface from boundry conditions
Would that be a fair way to frame the constraints (and lets just say that is a steady state condition with a low reynolds number for simplicity)?
Your thoughts ?
Tim
Solved! Go to Solution.
Solved by John_Holtz. Go to Solution.
Hi Tim,
You description is very close. I think you meant "exclude surface from boundary layer mesh" instead of "exclude surface from boundary conditions". Also, only the prescribed velocity (flow) is required in step 3; the inlet/outlet load is not needed.
Hi John,
Yes, I did mean the exclude surface from boundry layer mesh (does this matter if its is checked prior to meshing or after meshing ?)
Thanks for you help !
Tim
Excluding surface from boundry layer mesh has to be applied before surface meshing (i.e, click meshing button).