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Showing results 1 to 12 of 12 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX January 23, 2012, 05:41

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Can you please post your entire output file? ... Can you please post your entire output file? The error is a typical one - floating point error means you simulation has diverged. You need to improve the numerical stability. Use smaller time...

Forum: CFX January 22, 2012, 17:49

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks The CCL file is the top section of the output... The CCL file is the top section of the output file. If the output file (with the startup error) is short then just upload that.

Forum: CFX January 22, 2012, 06:34

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Can you post your CCL file for the current... Can you post your CCL file for the current simulation?

Forum: CFX January 18, 2012, 18:48

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks The image problem is that they are being shrunk... The image problem is that they are being shrunk somewhere. The problem is the way you have set things up in CFX-Pre, so fix the problem there, not WB. My last post said you used the wrong...

Forum: CFX January 17, 2012, 16:45

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Your images are still hardly readable. Do not use... Your images are still hardly readable. Do not use the lossy JPG format, use a lossless format like PNG. Also do not reduce the size of the images. You appear to have defined the argument unit as...

Forum: CFX January 16, 2012, 18:50

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Your images are barely readable, but it seems you... Your images are barely readable, but it seems you have mm as the input argument. It should be a unit of time (maybe seconds?).

Forum: CFX January 16, 2012, 16:21

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks You cannot name a function "pressure". That... You cannot name a function "pressure". That variable name is already reserved. Can you post either a screen shot from CFX-Pre or the CCL file?

Forum: CFX January 15, 2012, 17:56

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Have another look in the documentation and... Have another look in the documentation and tutorials on 1D interpolation functions. They are quite straight forward.

Forum: CFX January 15, 2012, 16:56

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks I have done this type of analysis many times. It... I have done this type of analysis many times. It is quite straight forward. Are you interested in the transient or steady state flow? If transient are you trying to model the pressure waves? You...

Forum: CFX January 15, 2012, 04:50

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks What input data do you have? Massflow versus time... What input data do you have? Massflow versus time at the exhaust valve? Pressure versus time? This is step 1.

Forum: CFX January 9, 2012, 04:47

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks I do not have time to upload an example. But the... I do not have time to upload an example. But the tutorial examples have examples of using CEL expressions so you should look there.

Forum: CFX January 8, 2012, 19:35

Replies: 30 Manifold intake simulation Views: 4,765 Posted By ghorrocks Define your boundary condition as a function of... Define your boundary condition as a function of time (either a CEL expression or a 1D interpolation function) and use that as the boundary value.

Showing results 1 to 12 of 12

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