Production of Turbulent Kinetic Energy

johndeas · December 13, 2010, 17:07

Hi,

I need to compute the term $\overline{u'_iu'_j}\frac{\partial \overline{u}_i}{\partial x_j}$ . If R is the volSymmTensorField containing the Reynolds stress, and Umean the mean velocity vector, is this the correct way to compute it ?

Code:

R.component(tensor::XX)*fvc::grad(Umean)().component(tensor::XX)+
R.component(tensor::XY)*fvc::grad(Umean)().component(tensor::XY)+
R.component(tensor::XZ)*fvc::grad(Umean)().component(tensor::XZ)+
R.component(tensor::YX)*fvc::grad(Umean)().component(tensor::YX)+
R.component(tensor::YY)*fvc::grad(Umean)().component(tensor::YY)+
R.component(tensor::YZ)*fvc::grad(Umean)().component(tensor::YZ)+
R.component(tensor::ZX)*fvc::grad(Umean)().component(tensor::ZX)+
R.component(tensor::ZY)*fvc::grad(Umean)().component(tensor::ZY)+
R.component(tensor::ZZ)*fvc::grad(Umean)().component(tensor::ZZ)

Thanks,

JD

boger · December 14, 2010, 09:22

Okay, but you might first have a look at the available operators. For example, something like

Code:

R && fvc::grad(Umean)

might be cleaner.

December 14, 2010, 09:22		#2
boger Senior Member David Boger Join Date: Mar 2009 Location: Penn State Applied Research Laboratory Posts: 146 Rep Power: 17	Okay, but you might first have a look at the available operators. For example, something like Code: R && fvc::grad(Umean) might be cleaner. __________________ David A. Boger

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