Solver setting when using hexahedral mesh

raunakjung · March 9, 2017, 01:15

I am using Fluent to perform my simulations. I have a simple geometry and using K-e model.
Mesh used is hexahedral mesh. I have checked the mesh quality.
Velocity inlet and pressure outlet condition is used.
Pressure velocity coupling - simple
gradient - least square based
1st order upwind for pressure momentum

Reynolds number 30000 and mach no is 0.9

My solution doesn't converges with the default setting. Is it is because I am using hexahedral mesh ? Does it need different numerical settings than tetra mesh ?

LuckyTran · March 9, 2017, 02:03

Not really.

Try a different initial guess.

raunakjung · March 9, 2017, 02:34

Thank you for replying. Does convergence depend upon intial guess ?

March 9, 2017, 01:15	Solver setting when using hexahedral mesh	#1
raunakjung Senior Member raunak jung pandey Join Date: Jun 2016 Posts: 102 Rep Power: 10	I am using Fluent to perform my simulations. I have a simple geometry and using K-e model. Mesh used is hexahedral mesh. I have checked the mesh quality. Velocity inlet and pressure outlet condition is used. Pressure velocity coupling - simple gradient - least square based 1st order upwind for pressure momentum Reynolds number 30000 and mach no is 0.9 My solution doesn't converges with the default setting. Is it is because I am using hexahedral mesh ? Does it need different numerical settings than tetra mesh ? Last edited by raunakjung; March 9, 2017 at 02:34.

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March 9, 2017, 02:03		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,754 Rep Power: 66	Not really. Try a different initial guess.

March 9, 2017, 02:34		#3
raunakjung Senior Member raunak jung pandey Join Date: Jun 2016 Posts: 102 Rep Power: 10	Thank you for replying. Does convergence depend upon intial guess ?