July 13, 2020 at 3:46 amabdulrahman86Subscriber
I am modeling a building inside a fluid domain to test the effect of wind on it, I generated a structured mesh and it has a reasonable quality but when I add the inflation layers to the intended surfaces the element quality of these surfaces decreases and the aspect ratio increases. The other quality measures are alright orthogonal value 0.38, max skewness 0.5
I am not getting a convergence so I thought that might be the case, any ideas?
July 13, 2020 at 4:10 am
July 13, 2020 at 4:21 amabdulrahman86Subscriber
Thank you for your response In fluent I did the following:
*K-epslon with enhanced wall treatment
*inlet as velocity inlet with constant speed
*outlet as pressure outlet
* Ground and building as walls
* defined reference values
rest are default, but no convergence, continuity flattened around 1e-1
July 14, 2020 at 3:33 amKeyur KanadeAnsys Employee
If you are using k-e eht, then please make sure that you have refined mesh near walls.
what is inlet velocity?
can you please insert image of mesh near wall.
you should have good boundary layer / inflation.
If this helps, please mark this post as 'Is Solution' to help others.
July 14, 2020 at 10:39 pmabdulrahman86Subscriber
I think the mesh near the walls has an issue, although the minimum orthogonal quality increased when I refined the mesh to become 0.7 the inflation layers are not showing in the intended faces except for one as shown in the attached pictures. All crosses in the pictures should have inflation layers similar to the one in the top of the building
The inflation layers reappear when I use the same number of division on all edges but that reduces the quality measures i.e. orthogonal around 2e-2
My inlet velocity is 14.5 m/s resulting in Re around 1.8e5
July 15, 2020 at 5:04 am
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