Unsteady Laminar Pipe Flow

ftimis · November 18, 2011, 12:46

Hi guys,

I am new here and generally not so experienced in using CFD softwares. I am currently working on Fluent trying to analyze a 2-D axisymmetric unsteady laminar pipe flow. I have designed the geometry using Gambit. I have to end up with a graph of volumetric flow rate over time. So I can imagine that I have to put a various velocity input (let say a sin function of time) instead of a constant one. How can I achieve this? I hope that I am clear.

Thank you

ftimis · November 19, 2011, 08:00

I know that maybe I was not so clear about what I was saying. After some research I think that I have to use a UDF related to time-dependent simulations using RP variable macros, e.g RP_Get_Real("flow-time"). Does anyone have any idea how can I find these UDF?

November 18, 2011, 12:46	Unsteady Laminar Pipe Flow	#1
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	Hi guys, I am new here and generally not so experienced in using CFD softwares. I am currently working on Fluent trying to analyze a 2-D axisymmetric unsteady laminar pipe flow. I have designed the geometry using Gambit. I have to end up with a graph of volumetric flow rate over time. So I can imagine that I have to put a various velocity input (let say a sin function of time) instead of a constant one. How can I achieve this? I hope that I am clear. Thank you

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November 19, 2011, 08:00		#2
ftimis New Member Efthymios Efthymiou Join Date: Nov 2011 Posts: 16 Rep Power: 14	I know that maybe I was not so clear about what I was saying. After some research I think that I have to use a UDF related to time-dependent simulations using RP variable macros, e.g RP_Get_Real("flow-time"). Does anyone have any idea how can I find these UDF?