Laminar Flow Problem

ahmadijaz · June 4, 2017, 05:27

Hi

I am new to ANSYS Fluent and trying to solve a simple problem using Fluent. I have added the problem description in the attachment section.
After setting up the geometry, meshing and model setup, when i hit the CHECK CASE button before the Run Calculations it pops up with this message. "Apply an axis boundary on the centerline (x-axis)" figure is also attached showing this message.
i have applied the centerline boundary condition then why it is prompting me again for the this condition.

and when i start calculation it stops with an error "Divergence detected in AMG solver: x-momentum"

JuanDCS · June 14, 2017, 08:45

if your using a symmetry condition to the centerline, you need to put it in x axis and before run the simulation in general conditions make a check for the mesh.

MayTheFlowBeWithYou · June 14, 2017, 09:39

Judging from what you want to do, I don't think you need to actually draw the centerline at all. I would just not draw it, or make the boundary condition for it "interior".

earc96 · July 9, 2017, 19:24

You just need half of your domain, and then one side will be your axis, that you apply your boundary condition.

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June 14, 2017, 08:45		#2
JuanDCS New Member Juan D. Carreño S. Join Date: Jan 2017 Location: San Cristóbal, Venezuela Posts: 5 Rep Power: 9	if your using a symmetry condition to the centerline, you need to put it in x axis and before run the simulation in general conditions make a check for the mesh.

June 14, 2017, 09:39		#3
MayTheFlowBeWithYou Member I have to remain anonymous, I'm sorry. Join Date: Jun 2017 Location: The Netherlands, Delft University of Technology Posts: 48 Rep Power: 8	Judging from what you want to do, I don't think you need to actually draw the centerline at all. I would just not draw it, or make the boundary condition for it "interior".

July 9, 2017, 19:24		#4
earc96 New Member Emanuel Camacho Join Date: Jul 2017 Posts: 8 Rep Power: 8	You just need half of your domain, and then one side will be your axis, that you apply your boundary condition.