How to specify a height varying turbulence model variables at inlet

anon_q · December 17, 2018, 17:19

Hello
I want to simulate the flow around a building in atmospheric boundary layer with the turbulence model K-omega SST. In this case

, $\omega$ are functions of the height

.

How can I specify theses boundary conditions at the inlet as a function of the height

?

fertinaz · December 17, 2018, 21:16

Hello Evren

Did you have a look at the tutorial case "turbineSiting"?

It uses ABL settings for U and k-epsilon, so it can be a good basis for your case but you'll probably have to implement sth. like "atmBoundaryLayerInletOmega". If you check "atmBoundaryLayerInletEpsilon" details, I am sure you can figure it out since the core implementation is done at "atmBoundaryLayer" under:

Code:

$FOAM_SRC/TurbulenceModels/turbulenceModels/RAS/derivedFvPatchFields

Check "atmBoundaryLayer" for ABL implementation:

Code:

[ertinaz@supernova derivedFvPatchFields]$ ls atmBoundaryLayer -l
total 16
-rw-rw-r--. 1 ertinaz ertinaz 4643 Jan 19  2018 atmBoundaryLayer.C
-rw-rw-r--. 1 ertinaz ertinaz 7083 Jan 19  2018 atmBoundaryLayer.H

Hope this helps

// Fatih

December 17, 2018, 17:19	How to specify a height varying turbulence model variables at inlet	#1
anon_q Senior Member Join Date: Mar 2018 Posts: 115 Rep Power: 8	Hello I want to simulate the flow around a building in atmospheric boundary layer with the turbulence model K-omega SST. In this case , $\omega$ are functions of the height . How can I specify theses boundary conditions at the inlet as a function of the height ?

December 17, 2018, 21:16		#2
fertinaz Member Fatih Ertinaz Join Date: Feb 2011 Location: Istanbul Posts: 64 Rep Power: 15	Hello Evren Did you have a look at the tutorial case "turbineSiting"? It uses ABL settings for U and k-epsilon, so it can be a good basis for your case but you'll probably have to implement sth. like "atmBoundaryLayerInletOmega". If you check "atmBoundaryLayerInletEpsilon" details, I am sure you can figure it out since the core implementation is done at "atmBoundaryLayer" under: Code: $FOAM_SRC/TurbulenceModels/turbulenceModels/RAS/derivedFvPatchFields Check "atmBoundaryLayer" for ABL implementation: Code: [ertinaz@supernova derivedFvPatchFields]$ ls atmBoundaryLayer -l total 16 -rw-rw-r--. 1 ertinaz ertinaz 4643 Jan 19 2018 atmBoundaryLayer.C -rw-rw-r--. 1 ertinaz ertinaz 7083 Jan 19 2018 atmBoundaryLayer.H Hope this helps // Fatih

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Modified k-e turbulence model UDF	Travis	Fluent UDF and Scheme Programming	7	November 11, 2018 20:21
Centrifugal fan-reverse flow in outlet lesds to a mass in flow field	xiexing	CFX	3	March 29, 2017 10:00
Wrong multiphase flow at rotating interface	Sanyo	CFX	14	February 7, 2017 17:19
Wrong flow in ratating domain problem	Sanyo	CFX	17	August 15, 2015 06:20
Centrifugal Pump and Turbulence Model	Michiel	CFX	12	January 25, 2010 03:20