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Search took 0.00 seconds. Search: Posts Made By: Martin Hegedus
Forum: CFX July 20, 2011, 19:02
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Thanks for the clarification. Do you have a...

Thanks for the clarification. Do you have a hypothesis of why the SD7003 results did not fair as well as the 0012?

Do you think it is atributed to the wind tunnel test, airfoil geometry, or...
Forum: CFX July 20, 2011, 13:36
Replies: 29
Views: 6,295
Posted By Martin Hegedus
I'm not sure of the various turbulence models...

I'm not sure of the various turbulence models that CFX has, but is there one which provides a dial so that you can tailor it to your case? For example, and this is complete speculation on my part,...
Forum: CFX July 20, 2011, 13:07
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Sorry, I'm confused. The abstract states ...

Sorry, I'm confused. The abstract states

"The current model was shown to reproduce the complex flow phenomena, including the laminar separation bubble dynamics and aerodynamic performance, with a...
Forum: CFX July 20, 2011, 12:44
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Sounds like the experiment is ok. So that leaves...

Sounds like the experiment is ok. So that leaves the turbulence model. Sorry, I don't have a specific idea about how to make the solutions better. I gather, somehow, more eddy viscosity has to be...
Forum: CFX July 19, 2011, 22:29
Replies: 29
Views: 6,295
Posted By Martin Hegedus
What Reynolds number are you at? In my...

What Reynolds number are you at?

In my opinion, there is two areas to focus on. Modeling the experiment correctly and the turbulence model.

In the experiment, what was the aspect ratio of the...
Forum: CFX July 19, 2011, 21:11
Replies: 29
Views: 6,295
Posted By Martin Hegedus
The intent was to run fully turbulent SA and SST,...

The intent was to run fully turbulent SA and SST, i.e. without the gamma theta transition model. This is to insure that the gamma theta transition model is working correctly and providing value...
Forum: CFX July 19, 2011, 11:51
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Not sure why your case with slip wind tunnel...

Not sure why your case with slip wind tunnel walls would have trouble converging when your case with no slip does converge. But, I don't have experience with the gamma theta turbulence model.
...
Forum: CFX July 15, 2011, 10:57
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Let's step back. How does your comparison look...

Let's step back. How does your comparison look at 4 degrees AoA?

It could be that the top and bottom walls (which I assume are solid) of the WT are affecting the results. But, since I don't have...
Forum: CFX July 13, 2011, 00:52
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Hi Nick, Sorry, I like working on these...

Hi Nick,

Sorry, I like working on these topics in a forum where everyone can later learn from the results and answers. Likewise, I depend on seeing other peoples questions and answers. I learn...
Forum: CFX July 12, 2011, 17:27
Replies: 29
Views: 6,295
Posted By Martin Hegedus
Any luck solving this problem? If it is...

Any luck solving this problem?

If it is still an issue can you post your Cl and Cd vs AoA for your results and data? Also, can you give a reference from where your data comes from?
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