Aspect ratio

Mohsin · November 1, 2010, 03:11

What effect does "aspect ratio" has on quality of the mesh? The worst element of my model has an aspect ratio of "17". Would it impact convergence in FLUENT and would it have profound effect on quality???

Guidance required. Thanks
Mohsin

aqib · November 4, 2010, 06:22

i do not think it but you also have to manage the value of y+ with it!!

Mohsin · November 4, 2010, 21:02

Thank you Aqib

yes you are right. So if the aspect ratio is high may be boundary layers should be added in the mesh.

aqib · November 5, 2010, 01:18

Aspect ratio can be decrease by two things.... One by boundary layer and second by increasing the number of nodes.....
but you have to make sure that your Y+ is also in control....
So best of luck....
Regards:
Aqib

heidar · November 16, 2010, 08:37

it shuld be concerned that having high aspect ratio in any where could conduct the solution to bad conditions of divergency.
i think that you have not enough results to study your y plus numbers.
i recommen you to generate a good mesh domain espeicially near the walls.

November 1, 2010, 03:11	Aspect ratio	#1
Mohsin Senior Member Mohsin Mukhtar Join Date: Mar 2010 Location: South Korea Posts: 249 Rep Power: 17	What effect does "aspect ratio" has on quality of the mesh? The worst element of my model has an aspect ratio of "17". Would it impact convergence in FLUENT and would it have profound effect on quality??? Guidance required. Thanks Mohsin

November 16, 2010, 08:37	dear sir	#5
heidar Member heidar jafarizadeh Join Date: Mar 2010 Location: Iran- Tehran Posts: 43 Rep Power: 16	it shuld be concerned that having high aspect ratio in any where could conduct the solution to bad conditions of divergency. i think that you have not enough results to study your y plus numbers. i recommen you to generate a good mesh domain espeicially near the walls.

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November 4, 2010, 06:22		#2
aqib Member Muhammad Aqib Chishty Join Date: Nov 2010 Posts: 50 Rep Power: 15	i do not think it but you also have to manage the value of y+ with it!!

November 4, 2010, 21:02		#3
Mohsin Senior Member Mohsin Mukhtar Join Date: Mar 2010 Location: South Korea Posts: 249 Rep Power: 17	Thank you Aqib yes you are right. So if the aspect ratio is high may be boundary layers should be added in the mesh.

November 5, 2010, 01:18		#4
aqib Member Muhammad Aqib Chishty Join Date: Nov 2010 Posts: 50 Rep Power: 15	Aspect ratio can be decrease by two things.... One by boundary layer and second by increasing the number of nodes..... but you have to make sure that your Y+ is also in control.... So best of luck.... Regards: Aqib