[ANSYS Meshing] bad mesh quality and diverge solution

raminostadi · April 13, 2018, 02:50

Hello everyone. I'm working on shock wave behind the rocket (missile) for one month . I simulate supersonic flow arrond the rocket.

I'm not sure but I think the problem is my mesh quality because I can't inflation layers around the rocket( because of stair mesh error). I really try for improving mesh quality but only I can change mesh sizing.

if one of you can solve my problem, I will send you my Ansys file to your email.
please help me. I'm new to meshing.

Capture 1 .JPG

Capture2.jpg

Capture 3.JPG

geometry.JPG

Ahmed Saeed Mansour · April 19, 2018, 09:57

Hello, you can check out the quality of the mesh by opening the quality drop down list and select skewness, the value of the maximum skewness must be equal or lower than 0.98, tell me please,
Thanks

raminostadi · April 20, 2018, 10:24

Thank you. Max of skewness is 0.8 and min of orthogonal quality is 0.24. Max of aspect ratio is 11. I know my mesh is not very bad but I'm in doubt about mesh quality.

Ahmed Saeed Mansour · April 20, 2018, 12:15

Okay, try please other techniques for meshing, watch videos about the inflation for 3D models on youtube or any pdf and tell me the progress please...Thanks

April 13, 2018, 02:50	bad mesh quality and diverge solution	#1
raminostadi Member ramin Join Date: Jul 2016 Posts: 41 Rep Power: 9	Hello everyone. I'm working on shock wave behind the rocket (missile) for one month . I simulate supersonic flow arrond the rocket. I'm not sure but I think the problem is my mesh quality because I can't inflation layers around the rocket( because of stair mesh error). I really try for improving mesh quality but only I can change mesh sizing. if one of you can solve my problem, I will send you my Ansys file to your email. please help me. I'm new to meshing. Capture 1 .JPG Capture2.jpg Capture 3.JPG geometry.JPG

April 20, 2018, 10:24	quality of mesh	#3
raminostadi Member ramin Join Date: Jul 2016 Posts: 41 Rep Power: 9	Thank you. Max of skewness is 0.8 and min of orthogonal quality is 0.24. Max of aspect ratio is 11. I know my mesh is not very bad but I'm in doubt about mesh quality.

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April 19, 2018, 09:57		#2
Ahmed Saeed Mansour Senior Member Have a nice time! Join Date: Feb 2016 Location: mech.eng.ahmedmansour@gmail.com Posts: 291 Rep Power: 11	Hello, you can check out the quality of the mesh by opening the quality drop down list and select skewness, the value of the maximum skewness must be equal or lower than 0.98, tell me please, Thanks

April 20, 2018, 12:15		#4
Ahmed Saeed Mansour Senior Member Have a nice time! Join Date: Feb 2016 Location: mech.eng.ahmedmansour@gmail.com Posts: 291 Rep Power: 11	Okay, try please other techniques for meshing, watch videos about the inflation for 3D models on youtube or any pdf and tell me the progress please...Thanks