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p8.142_solution

# p8.142_solution - FLOWLAB SOLUTION 8.142 Use the FlowLab...

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FLOWLAB SOLUTION 8.142 Use the FlowLab template orifice to investigate how the flowrate through an orifice meter varies as a function of pressure drop across the meter. According to the text of this chapter, the flowrate is proportional to the square root of the pressure difference, or 2 1 ~ P P Q - . Set the pipe radius to r = 0.1 m with a diameter ratio of 0.4 and use the “Flat” orifice plate configuration. Use the default of water for the “Materials” and vary the inlet velocity to simulate Reynolds numbers of 5000, 10000, 50000, and 100000. At these Reynolds number values, the turbulence model will be used. Create a “Fine” mesh for the grid and use a convergence criterion of 1x10 -4 . Using the “Total Pressure Difference” in the “Reports” section, create a plot of the flowrate as a function of pressure difference. Document how Q varies with the pressure difference based on the simulation results and compare this to the variation show in the text.

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p8.142_solution - FLOWLAB SOLUTION 8.142 Use the FlowLab...

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