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Unable to calculate pressure drop in Preiodic Boundary condition in Fluent

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Old   June 14, 2020, 08:38
Default Unable to calculate pressure drop in Preiodic Boundary condition in Fluent
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Madhu Kalyan
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So I took a simple problem of a 2cm x 2 cm x 5cm duct and gave a mass flow rate of 1kg/s with air as the fluid in order to simulate periodic BC over a total length of 50 cm. If I give the specified pressure drop and simulate the model I get the exact massflow rate but if I give the mass flow rate my pressure drop is giving bad numbers. What is the problem?
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Old   June 15, 2020, 08:12
Default Pressure Drop
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Do note that the pressure gradient is given as per m of length. And by bad, how bad do you mean?
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Old   June 15, 2020, 09:05
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By bad I mean almost zero pressure gradient. And yes iam talking about the pressure drop per length
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