Different result from each simulation with same model

[trmr]

Hi,

I started to learn Autodesk CFD Simulation online one month ago, and I am now starting to do some simulations. 

I'm trying to simulate the wind flow/load on rooftop solar panel with different geometry.

For the same model, the results of the wall pressure are so different....sometime it is -18psf, somtime it goes to 7000psf...I have no idea what's going on.

For different simulation, all the settings are the same, the only slightly differences may be be meshing, interactions to run, and external volumn

But....I don't think that should influence the result that much

If somone can tell me what may be go wrong in the simulations?

[hs.simanto]

Hi!

Meshing, iterations to run and external volume; these can influence any result by a long way. Your support.cfz file would be helpful for others to review your problem.

Thank you!