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Increasing the turbulence in the domain

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Old   January 26, 2021, 19:08
Default Increasing the turbulence in the domain
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Arijit Saha
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Hello Foamers,
I'm modelling a cyclic flow channel with OpenFOAM. Though my Reynolds Number is around 3.2E5 the flow does not get turbulent. My domain is 600m long, 130m wide and 130 m height and the cell size is 200 x 400x 50 with simplegrading (1, 200, 1). I impose a current Ubar of 10.5m/s with some non uniform initialilization. The models calculates 10000s of flow.
Using the rest configuration same as channel 395 case,
LES model= WALE
ddt scheme=backward
y+= 5-10
delta t=0.05
application =pimpleFoam

I'm also attaching the patch summary if needed.

Simulation ran till 2500 sec but no such significant eddies are visible.
How can I expect to see more turbulent flow in the domain?
Attached Files
File Type: docx LOG summary.docx (14.2 KB, 4 views)

Last edited by ari003; January 27, 2021 at 12:41.
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Old   January 29, 2021, 17:08
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Ran
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0. no one will pull *.docx to check your log. Just paste the pain text where you find the error is likely to generate.

Your y+= 5-10 is in the buffer layer, which is the most tricker region you could play with.

In LES, people usually have y+<1, so you need to refine your computational domain in those sensitive region.
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