negetive pressure in CFD-ACE
 

i am doing a problem on mixed flow compressor rotating a speed of 40000rpm,and pressur ration of 3,while giving iteratins i n stating only,"problem diverged negetinv pressure found in n cells"

can u help me about this how to resolve this, --structed mesh,with tip clearence,splitte blade, is this software can do this type of speed rotor

reply me urgent,pls say if u r doing this type of problem in this software,

thanking you