2 Replies Latest reply on Sep 12, 2017 10:37 AM by Bill McEachern

    Hurricane coming out of my fan simulation

    Ray Ackley

      I'm getting very strange numbers running a simulation using a fan defined from the manufacturers datasheet - the numbers are much too high.

       

      I have a relatively simple tubular enclosure with an External Inlet Fan on one lid and Environment Pressure boundary condition on the other lid. Fluid is air, all pressures are std atmospheric, all other parameters are left at their defaults. I set a few surface goals for the environment pressure lid (outlet), including Volume Flow Rate and Avg Velocity. 

       

      I expect the fan to simulate about 8.8 m3/min or something slightly lower as that is the plotted airflow with 0 static pressure.  However solidworks is simulating a value of 148.8 m3/min (value below *60) and a velocity of >300 mph!! 

       

      Volume Flow Rate [m^3/s]:  -2.4869

      Avg Velocity [m/s]:  151.288

       

      The flow trajectories look like they pass the sniff test, but the numbers are way off..  what am I doing wrong here?