Hi,
A simple question.
H
Hi,
A simple question. How is wall-functions for RANS disabled and enabled? To me, it looks like in turbulenceProperties that wall-functions can be chosen on the same level as choosing the k-epsilon model. But I can also see in the implementation of the turbulence models that the source files for the wall-functions are included. Thanks in advance, Rasmus |
All high-Re RANS turbulence mo
All high-Re RANS turbulence models include wall-functions because it is inappropriate to use them without. Only the low-Re models operate without wall-functions as they include model-specific wall treatments.
|
Sorry, I forgot to mention abo
Sorry, I forgot to mention about my calculation setup's detail.
1. I'm running high-Re RANS. 2. I need to apply the rough wall function only to a ground and other walls should be calculated with normal slip wall function. So I would like to change wall functions whether a wall is a ground or not. Since I'm beginner about both OpenFOAM and C++ language;;, I would like to copy and modify the wall function sources directly, but I still need to switch wall functions with using information of the wall. [Q] How can I switch wall functions according to wall's information(name?) in RANS wall function sources? Thanks for your advice, Masashi IMANO |
Production term
Dear Henry and RANS-experts,
first of all, thank you for the improved near wall treatement (NWT) of kOmegaSST. I really appreciate it. :) However, to have a reliable NWT, 2 questions may arise: 1) Production term:
Andi Ps.: As english is not my mother tongue, some statements may sound a bit rude. If this is so, don't take it amiss. It was never my intention. |
Sorry
Sorry, wrong thread:)
|
I think it is very difficult to understand how wall function works in OpenFOAM.
When you select high Renolds number kEpsolon model, it will be automatically be used ? Or when you select nutWallFunction, it will be automatically used ? If velocity wall function will be automatically used, then temperature wall function how to use ? for example, buoyantBoussinesqSimpleFoam, It doesn't have a variable for temperature to use wall function. As far as I know, alphat wall function can only be used for compressible flow. Am I right? |
All times are GMT -4. The time now is 04:18. |