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#1 |
New Member
GGumbira
Join Date: Feb 2018
Posts: 3
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Hey everyone,
I am writing my own code to solve 2D navier-stokes equation with SIMPLE scheme in backward step simulation. Now, my supervisor asked me to add the static smagorinsky term in that model. However, I read in some references it need rate of strain tensor (0,5(dui/dxj+duj/dxi)). My question is how to calculate the rate of strain tensor from U,V velocity which I solved before ? Thanks |
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#2 | |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,926
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Quote:
You use numerical derivatives applied on U and V, what is your problem? |
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#3 |
Senior Member
Join Date: Dec 2017
Posts: 153
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Hello,
Basically you have to compute gradients (somethimg that you must have in your cfd code) assemble the tensor as you have defined it and calculate its module. Apply the formula for eddy viscosity and Smagorinsky ends here ![]() |
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#4 |
New Member
GGumbira
Join Date: Feb 2018
Posts: 3
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Thank you professor. I already solve this problem
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#5 |
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Join Date: Apr 2020
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Tags |
rate of strain tensor, smagorinsky |
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