Learning Forum

[gwilliams1]

Hello,

I am running my 3D flow simulation for my airfoil and I am unable to get conclusive data. When I run my simulation at a high speed, my lift makes sense, but when I run it at 25 mph, I get inconclusive data. I don't understand why it is doing that and I was wondering if anyone has any suggestions.

My cL graph when I have high speeds:

My cL graph when the speed is at 25 mph:

 

[Amine Ben Hadj Ali]

high speed means? What about convergence behavior?

[gwilliams1]

Well I was following the 3D transonic flow simulation from Cornell and they used a mach speed of 0.8395. I think I just used the default for the convergence behavior, is there something I should change for that?

[Rob]

What does the flow field look like? That may well explain your graph, as may the convergence plots. 

[gwilliams1]

Here is what my fluid region looks. How should I make for a 3D flow simulation?