# Eulerian Granular flow:receive reverse flow and solution isn't converge

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May 12, 2013, 01:46
Eulerian Granular flow:receive reverse flow and solution isn't converge
#1
New Member

Join Date: Dec 2012
Posts: 5
Rep Power: 6
Hi all friends
I want to modeling steady state two-phase flow of liquid - solid using Eulerian-Granular approach in Fluent but when I do it,I receive Reverse flow in pressure inlet and outlet message (my BCs are pressure inlet&outlet) and solution isn't converge.
A two-dimensional (2-D) axisymmetric model was created and meshed with Gambit as shown in attach picture.
multiphase particulate (volume fraction= 0.2) fluid was pumped into the main model inlet (with pressure inlet=13.8Mpa), and mingled with multiphase particulate (volume fraction = 0.8) fluid was pushed from the bottom inlet(pressure inlet=13.8Mpa) then flow to outlet(pressure outlet=10.3Mpa).
I've tried both steady and unsteady state with different URF but solution isn't converge.
particle diameter:45e-6 m
particle density:2350 kg/m3
fluid density:1000 kg/m3
solid fluid interaction:syamlal o'brien
Assuming a wall boundary instead of the porous medium and drill string/pipe is wall BC in domain.
Regards
Attached Images
 Gambit.jpg (54.9 KB, 31 views)

January 2, 2014, 12:53
#2
Senior Member

Join Date: May 2011
Posts: 231
Rep Power: 9
Hi,
did you manage to solve the problem because I have the same problem.
Best!
Quote:
 Originally Posted by bahman Hi all friends I want to modeling steady state two-phase flow of liquid - solid using Eulerian-Granular approach in Fluent but when I do it,I receive Reverse flow in pressure inlet and outlet message (my BCs are pressure inlet&outlet) and solution isn't converge. A two-dimensional (2-D) axisymmetric model was created and meshed with Gambit as shown in attach picture. multiphase particulate (volume fraction= 0.2) fluid was pumped into the main model inlet (with pressure inlet=13.8Mpa), and mingled with multiphase particulate (volume fraction = 0.8) fluid was pushed from the bottom inlet(pressure inlet=13.8Mpa) then flow to outlet(pressure outlet=10.3Mpa). I've tried both steady and unsteady state with different URF but solution isn't converge. particle diameter:45e-6 m particle density:2350 kg/m3 fluid density:1000 kg/m3 solid fluid interaction:syamlal o'brien Assuming a wall boundary instead of the porous medium and drill string/pipe is wall BC in domain. please guide me Regards

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