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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX May 25, 2010, 19:03

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks Do the conversion from cc/RPM to kg/s in CEL. You... Do the conversion from cc/RPM to kg/s in CEL. You can enter all the variables in their native units and that helps to reduce conversion errors.

Forum: CFX May 24, 2010, 18:31

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks I see. The butterfly valve will dramatically... I see. The butterfly valve will dramatically affect the inlet manifold wave, and this is not only a flow resistance thing, it is a pressure wave reflection thing. That means obtaining a "pressure...

Forum: CFX May 24, 2010, 07:03

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks I can't see them in your animation. This means... I can't see them in your animation. This means they are far too small and the transition from the prisms to the tets will be terrible. You need a much coarser prism layer so the transition to tets is...

Forum: CFX May 23, 2010, 18:49

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks From your animation I can see you have no... From your animation I can see you have no inflation layers. You will need them to get good flow resistance. Also if you want to get a good reflection off the end of the inlet manifold you need to...

Forum: CFX May 22, 2010, 07:22

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks OK, thanks. Then the convergence problem is... OK, thanks. Then the convergence problem is almost certainly associated with the coupling to the 1D model. I think I have already said my recommendation is just to model the entire manifold in CFX,...

Forum: CFX May 22, 2010, 06:58

Replies: 12 Manifold transient simulation Views: 3,144 Posted By ghorrocks What is causing the flow cycle? If it got... What is causing the flow cycle? If it got through 2 cycles and crashes on the third cycle I suggest it is an area of numerical instability which finally got too much on the third go. Try double...

Showing results 1 to 6 of 6

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