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July 1, 2019, 08:42 |
Postprocessing of divergence of U
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#1 |
New Member
SOURAV GANGULI
Join Date: Dec 2018
Posts: 11
Rep Power: 7 |
Hi guys,
I am simulating the turbulent channel flow using PISOFOAM solver. I calculated the divergence of U using the command pisoFoam -postProcess -func "div(U)" But during calculation it shows a warning massage '--> FOAM Warning : functionObjects::div div(U) cannot find required object U of type surfaceScalarField Can you kindly tell me what causes this?' |
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July 8, 2019, 03:21 |
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#2 |
Senior Member
Zander Meiring
Join Date: Jul 2018
Posts: 125
Rep Power: 7 |
try just using the command
Code:
postProcess -func "div(U)" |
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July 8, 2019, 06:27 |
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#3 |
New Member
SOURAV GANGULI
Join Date: Dec 2018
Posts: 11
Rep Power: 7 |
I understood. But can you kindly tell me what is the difference between div (U) and div (phi) in case of incompressible flow solvers?
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June 20, 2022, 09:21 |
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#4 |
Senior Member
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 355
Rep Power: 8 |
basically U is a vector and means velocity, phi is the volumetric flux on the faces of the cell. the output for both will be a volScalarField with the dimension 1/second for both. but the value will not be the same.
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