I needed some help with cosmos flow works

[akatheman]

I can do the the external flow easily enough however whenever i try to analyze the internal flow of a plenum four cylinder I cant get the plenum to "seal" for the solid vrs boundary layers.

I have mated each end of the runners with the closest concentric ends. The ends are the Outer diameter of the runner. I repeated the process for the throttle body plate adding a small amount around the outside diameter and have the plate concentric the hole in the plenum for the throttle body. There are no other holes in the model.

I set the initial conditions on the T/B and the 4 plenum ends. I set on the componet list to those componets being "disabled" Whenever i try to insert boundary conditions it always says that this plate is not between the solid/fluid flow and in the geometry calculator it always reads the fluid volumn as 0.

I was also careful to lay welding beads at all seems, just incase a part wasnt perfectly matched, but everything is completely 0'd in the model.

Am I missing a step somewhere or messing up a process?

 

[NickE]

You need to do more to seal your model. Welds dont exist as far as FW is concerned.

 

[akatheman]

What do I have to do to "seal it?"

 

[SBaugh]

NickE,

That's true in all of Cosmos as well. It must be one body in a part, Cosmos does not see or use Multi-bodies.

Regards,

Scott Baugh, CSWP
3DVision Technologies

http://www.3dvisiontech.com

http://www.scottjbaugh.com

faq731-376
faq559-716 - SW Fora Users

 

[NickE]

"What do I have to do to "seal it?" "-akatheman

you have to just intersect the "lids" with your openings.

IE: Make a flat disk 1/4" thick and bigger in diameter than your runner. Place this lid over the end of the runner. Now push the plate over the runner and make the runner extend 1/8" into your plate.

You can then define a pressure, flow, or other type of opening on the face made from the intersection of the runner ID and the inside of the lid.

PS- thanks for fleshing my first response Scott

 

[akatheman]

Thanks for the replies! With your help I have everything working properly.

 

[NickE]