[chen112p]

Hello, I added a few lines in pimpleFoam to extract the subgrid scale TKE. But my question iswhen I am running LES models such as SA-IDDES, or Smagorinsky where I dont see the TKE term in the equation, what is this turbulence->k() going to get me?

Thanks!

Junting

[HPE]

Hi,

- In Spalart-Allmaras turbulence model, for example, requesting "k" field returns a scalarField with full of zeros alongside a warning to the user: see.

[chen112p]

Originally Posted by HPE

Hi,

- In Spalart-Allmaras turbulence model, for example, requesting "k" field returns a scalarField with full of zeros alongside a warning to the user: see.

I do get something out of this when running SA-IDDES for some reasons... In a channel simulation, the value of it is pretty high near ground and slowly diminished in the free stream. I am guessing it is somehow related to nuTilda. When I turned nuTilda off (initialize uniform 0 in the field and on all boundaries), I get all 0 value from this scalar created by turbulence->k(). But also it seems changing nuTilda value on the inlet doesn't impact this scalar.

[HPE]

Ah ok, DES: It returns the SGS kinetic energy, see. (IDDES class inherits DES class attributes.)