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Search: Posts Made By: DBurns
Forum: Siemens December 6, 2009, 15:52
Replies: 16
Views: 5,143
Posted By DBurns
Yes, Maddin got us very close to measured data....

Yes, Maddin got us very close to measured data. (176.93 g/s measured vs. 176.43 predicted)


He had us switch from k-e to k-w SST, used 5 boundary layers instead of 2
Start out 2nd Order using...
Forum: Siemens October 20, 2009, 16:03
Replies: 16
Views: 5,143
Posted By DBurns
That would be great if you could look it over and...

That would be great if you could look it over and critique our model. How shall I get the file to you? Do you have an ftp? I'll have to pass it by the team but I don't expect any problems.
Forum: Siemens October 20, 2009, 14:38
Replies: 16
Views: 5,143
Posted By DBurns
Thank you, Maddin, for your valuable insight. I...

Thank you, Maddin, for your valuable insight. I am exploring the options you've outlined. Can you explain your recommendations a little more in detail? I'm just beginning my journey in fluids!

I...
Forum: Siemens October 14, 2009, 17:30
Replies: 16
Views: 5,143
Posted By DBurns
As far as I've tested, the mass flow rate does...

As far as I've tested, the mass flow rate does not seem to be affected much by varying Turbulence Intensity and Viscosity Ratio values. I changed them by orders of magnitude and they end up with...
Forum: Siemens October 14, 2009, 12:29
Replies: 16
Views: 5,143
Posted By DBurns
I understood you correctly but maybe I did a poor...

I understood you correctly but maybe I did a poor job of explaining myself. I used the spreadsheet to calculate initial values in the physics continuum to avoid seeing pressure/temp/viscosity...
Forum: Siemens October 14, 2009, 01:12
Replies: 16
Views: 5,143
Posted By DBurns
First off, Thanks Guys for your helpful advice. I...

First off, Thanks Guys for your helpful advice. I really appreciate it.

With all parts displayed the highest Y+ value is ~57. After scouring these boards I realize how important the Y+ metric is....
Forum: Siemens October 13, 2009, 12:58
Replies: 16
Views: 5,143
Posted By DBurns
CCM+ Solution 11% higher than measured intake port flow - what are we doing wrong?

The model is a 4-valve motorcycle intake port for FSAE competition. The port is symmetrical and is modeled using only half the geometry with the valve at peak lift. -6975 Pa on Pressure Outlet...
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