TAGGED: cfd-microfluidic, expression, pressure-outlet, udf-fluent
February 12, 2021 at 9:16 pmSudharsanSadagopanSubscriberHi,nI am trying to simulate flow through a microchannel system. Since I don't wish to simulate the flow through some of the downstream components (mostly pipes), I have truncated my design and am calculating the pressure drop across the pipes and giving that as the outlet pressure boundary condition.nSince I have multiple outlets, I wish to give an expression for pressure in terms of the volume flowrate passing through the particular outlet. Since I couldn't find an explicit term in the list for Flowrate, I am expressing my flowrate as a product of my VelocityMagnitude and Outlet area and coding it in as belownAverage(VelocityMagnitude,[outlet],Weight = 'Area')*Area([outlet])nI wish to know if there is a Flowrate variable in Fluent or a more straightforward way of representing it.nThanks
February 13, 2021 at 12:26 amYasserSelimaSubscriberThere is a flow rate which is area integral of velocity ... and the velocity should be normal to the boundary, not magnitude.nnYour expression works but you need to correct the velocity magnitude with normal velocity ... And I belive there is an expression term for the VolumeFlowRate which would solve your problemn
February 15, 2021 at 4:40 amKeyur KanadeAnsys EmployeeHere are field variables available with expression. nRegards,nKeyurnHow to access Ansys Online Help DocumentnHow to show full resolution imagenGuidelines on the Student CommunitynHow to use Google to search within Ansys Student Communityn
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