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

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.

monitors/surface/dynamic pressure on what you want/ after you have to open it in excel. easy

cip