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Flow simulation accuracy

Question asked by Adam Fain on Jul 13, 2011
Latest reply on Jul 24, 2011 by Eamon Ronan

Has anyone ever had the opportunity to compare flow simulation results to actual test data?  How did it compare?  I'm running internal flow on a swivel head for a hydraulic torque wrench to find the pressure drop across it.  When compared to actual lab data, flow simulation predicted consistently lower values.  I defined an inlet volume flow, and an outlet static pressure (ambient), then surface goals on the inlet and outlet to find the static pressure difference.  I defined hydraulic oil as a custom liquid, so perhaps the viscosity or density is slightly different, but it wouldn't be as significant as what was seen.  I'll attach a screenshot of the graphs for reference.