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Problem with Eccentric pipe annulus..Pls Help me

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Old   March 16, 2005, 07:24
Default Problem with Eccentric pipe annulus..Pls Help me
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Parag Ramteke
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Hello, I am using Fluent to study the flow of Non-Newtonian Fluid through pipe annulus.To verify my results (pressure drop over length of pipe)with analytical, at present I am using Fluid of density 800 kg/m^3 and Viscosity 1 kg/m-s. I got the results matching with analytical solution for 2D geometry in Gambit for concentric annulus only. But when I make the annulus eccentric the pressure drop is more than the concentric annulus(outer pipe is 2m in diameter50m long; inner pipe is 1 m in diameter and 50 m long; I am using offset of 0.1,0.2,0.3..from center). (In Gambit,first I am creating vertices and then edges--joining edges to creat rectangular face--then subtracting inner rectangle from outer retaining innner rectangle to get the annulus--meshing edges,faces--and specifying boundary conditions as VELOCITY INLET and PRESSURE OUTLET). I have tried to refine the mesh but couldn't get the answer. I also tried in 3D , but in 3D I couldn't even get the results matching with analytical for concentric annulus. I would appreciate it greatly if you can help me with this. Thank you very much for your time

Best Wishes, Parag

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Old   March 18, 2005, 01:50
Default Q:how to extract dynmic pressure in fluent
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amresh
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pls send the information regarding how to extract the dynamic pressure in fluent. and how to write on excel file.then how to the regession.
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Old   April 4, 2005, 06:34
Default Re: Q:how to extract dynmic pressure in fluent
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daniel
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monitors/surface/dynamic pressure on what you want/ after you have to open it in excel. easy

cip
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