Mesh Results Correct or Not

sid_rath · December 28, 2016, 11:53

I am doing a turbulent flow simulation (Re = 10000). I am using different mesh to see the results. Each time i am using a mesh, i am getting different results. How to know that which results is right. Is there any criteria/number which tells you that you are doing with the correct mesh. Thanks.

sid_rath · December 28, 2016, 11:55

Can cell peclet number be of any help here?

lcarasik · December 28, 2016, 13:24

What type of simulation are you doing? What is the difference in the values you are using to determine mesh sensitivity?

sid_rath · December 28, 2016, 14:47

I am doing vortex shedding with suction and blowing. I am looking at COEFFICIENT OF LIFT & COEFFICIENT OF DRAG on the body to compare my result of different mesh. Generally the values converge as we increase the mesh size but in this case i am getting different different values as i am refining the mesh.

December 28, 2016, 11:53	Mesh Results Correct or Not	#1
sid_rath New Member Sidhartha Rath Join Date: Dec 2016 Posts: 3 Rep Power: 9	I am doing a turbulent flow simulation (Re = 10000). I am using different mesh to see the results. Each time i am using a mesh, i am getting different results. How to know that which results is right. Is there any criteria/number which tells you that you are doing with the correct mesh. Thanks.

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December 28, 2016, 11:55		#2
sid_rath New Member Sidhartha Rath Join Date: Dec 2016 Posts: 3 Rep Power: 9	Can cell peclet number be of any help here?

December 28, 2016, 13:24		#3
lcarasik Senior Member Lane Carasik Join Date: Aug 2014 Posts: 692 Rep Power: 14	What type of simulation are you doing? What is the difference in the values you are using to determine mesh sensitivity?

December 28, 2016, 14:47		#4
sid_rath New Member Sidhartha Rath Join Date: Dec 2016 Posts: 3 Rep Power: 9	I am doing vortex shedding with suction and blowing. I am looking at COEFFICIENT OF LIFT & COEFFICIENT OF DRAG on the body to compare my result of different mesh. Generally the values converge as we increase the mesh size but in this case i am getting different different values as i am refining the mesh.