Entries for September 2017

Originally Posted by chris1980

I want to use the 'turbulentInlet' boundary condition. As far as I can see the use only inputs a fluctuation scale but what about the integral length scale or other appropiate scales because the flucation scale alone do not define a turublent inlet.

Ok I know it is anyway no real turbulent inlet because there is no turbulence strcuture etc.

Additionally, I was wondering what I have to set for k and epsilon at this turbulent boundary

Originally Posted by Hanzo

Hi everybody,

I found the following issues in OpenFOAM concerning some turbulence analysis:

- the utility createTurbulenceFields only works for RAS computations
- there is no standard utility to average fields after computation has been done (to get U-mean, U-rms, R-Mean, Reff-Mean ...)

So I worked on these utilities and after mentioning it in some posts I got replies and private messages asking me if I could publish

Originally Posted by zordiack

Hi, I wanted a fully developed inlet velocity profile for my 3D-case and I decided to implement it using swak4Foam since I couldn't figure out how to do it with native OpenFOAM tools. So, I thought I'd share my solution here since it took me a while to figure it out.

Please note that in my case the inlet pipe centerline run along the y-axis, but it should by easy enough to modify for other cases too. Turbulent velocity profile is calculated

Originally Posted by openfoammaofnepo

Dear ngj,

Thank you so much. Today I met the pTraits in the turbulentInlet.C again. So I had a look at thread again. The codes are as follows:

Originally Posted by hjasak

Easy:
- on correctBoundaryConditions() for a field
- on updateCoeffs() at matrix creation

correctBoundaryConditions is also called after the linear solver call automatically.


Enjoy,

Hrv