Tonn wrote:I was trying to run the whole car in CFDesign, but I received a message:
Meshing error: Insufficent memory available to complete mesh generation (code 250)
Does adding RAM solve the problem?
Tonn, first time posting here, and I must say well done with the modeling. Are you still using the free version of Alibre? I'm impressed.
I have some experience with CFdesign (though it's at work, so not sure if I could run your model, though I'd like to try). First thing I'd recommend is splitting the model in half lengthwise and putting a symmetry boundary plane in the center, if you haven't already. That should cut your model size in half, and not matter much in results unless you're trying to model turns. There is a "mirror" function so you can view the results as if you'd modeled the whole thing.
What version of the program are you using? The later ones have some much better mesh refinement options that should let you target areas of interest better; v2011 will be even more improved based on the betas. Also, make sure you're running the 64-bit version and definitely throw as much RAM in the system as you can.
Finally, definitely make sure you play with the different turbulence models, though I'd recommend fiddling with smaller models than your full car, to see which ones match published results better. CFdesign is in general very good at fairly quick, back-to-back comparisons of different designs, and that's what I'd focus on. But I've found it's hard to get reliable drag numbers for external flows without a really dense mesh, and even then you're going to have only moderate wake results with the turbulence models available... that's why the teams have very expensive flow codes with hundreds of processors available.
Good luck.
