flow simulation through radial impeller

Hi  all

im working on simulating flow through an end-suction impeller with its volute , i have defined the inlet boundary condition as inlet volume flow of 0.0466 m3/sec , and outlet boundary condition as environmental pressure , however, the results are totally in-correct..

i have used internal anaylsis , with global rotating system of 185 rad/sec. and since im new in using flow simulation , i think i have must missed some parameter that missed-up my simulation , i apprecite your help in case you have went through such case?

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