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# Using SolidWorks Flow Simulation to Determine Which Fan Blade is Better

## Using SolidWorks Flow Simulation to Determine Which Fan Blade is Better

(OP)
Hey Everybody,

I am using SolidWorks Flow Simulation to look at the internal flow of air passing through a tube. Inside the tube is a small fan blade (approximate .700" OD). I am simulating the fan blade running at 2000 RPM.

I have several versions of the fan blade, and I am trying to figure out which "metric" to use to make an apples-to-apples comparison between the 4 different fan blades that I have designed.

I do not see MASS FLOW RATE as one of the options for simulation results. MASS FLOW RATE is however one of my goals for simulation convergence. When I look at the GOAL PLOT, the MASS FLOW RATE is positive and negative...like a transient response...until the MASS FLOW RATE converges. Is the converged value for MASS FLOW RATE the number that I should be looking at?

I thought that I would have to somehow integrate the velocity over the cross-sectional area and then multiply by the density (assuming constant density for air for simplification).

TIA,
--Neal
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