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Can you control fluid flow with a boundary condition?
Posted 2020年3月30日 GMT+2 00:13Computational Fluid Dynamics (CFD), Geometry, Parameters, Variables, & FunctionsVersion 5.41 Reply
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Hello, First of all, thank you so much for the time you spent reading/answering my question. [Laminar flow module] I have a pipe with a diameter D,' and I reduce the diameter of the pipe to 'd' for short length, and get back to the original diameter. By doing this procedure, I get to build a control flow valve at the middle of the pipe. I can control the flow by reducing or increasing the value of 'd' ('d' has a max value of 'D'). Instead of changing the geometry every time, is there a way to control the flow at the middle of the pipe with a boundary condition?
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I found a way! We can use a fluid properties boundary condition for the small domanin that represents the valve. With this boundary, we just had to increase the viscosity to maginitud of 1000. For example when the valve represent half of a circlye on the pipe, half of that domain has big viscosity while the other has the normal viscosity.