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Search took 0.00 seconds. Search: Posts Made By: sven
Forum: OpenFOAM October 12, 2009, 13:18
Replies: 13
Views: 4,712
Posted By sven
Hi olwi, first of all thanks for your...

Hi olwi,

first of all thanks for your answer. I implemented my own turbulence model by editing the existing LaunderGibsonRSTM from OpenFOAM 1.6. That means, I replaced the existing equation for...
Forum: OpenFOAM October 2, 2009, 20:48
Replies: 13
Views: 4,712
Posted By sven
Hi Olwi, I do use wall functions. The...

Hi Olwi,

I do use wall functions. The distance of my first cell to the wall is about y+~30 to bridge the viscous sublayer with the wall function. That means I do not resolve the viscous sublayer....
Forum: OpenFOAM September 29, 2009, 21:09
Replies: 13
Views: 4,712
Posted By sven
Hi again, as stated above, my model is now...

Hi again,

as stated above, my model is now working, which means that my calculations are actually converging now. Nevertheless the results do not yield what we expected. After running several...
Forum: OpenFOAM September 18, 2009, 20:50
Replies: 13
Views: 4,712
Posted By sven
I found the error. My translation from...

I found the error. My translation from Einsteinian tensor notation into matrix notation was not entirely correct. Instead of
symm(b&W+W&b)

it must be symm(-b&W+W&b)

because the k-index of the...
Forum: OpenFOAM September 17, 2009, 16:49
Replies: 13
Views: 4,712
Posted By sven
Well, I now discovered that the implementation of...

Well, I now discovered that the implementation of the last summand of my model (see equ. (10) in first attached file of first post) is still wrong. Now, here is the dilemma:



First of all,...
Forum: OpenFOAM September 17, 2009, 15:32
Replies: 13
Views: 4,712
Posted By sven
This is the third answer from hjassak:

This is the third answer from hjassak:
Forum: OpenFOAM September 17, 2009, 15:26
Replies: 13
Views: 4,712
Posted By sven
Hi Hrv, thank you for your answer. With your...

Hi Hrv,

thank you for your answer. With your help, I could now finally solve my problem and compile my new turbulence model. Unfortunately, it doesnt work properly. When I start a calculation it...
Forum: OpenFOAM September 17, 2009, 15:26
Replies: 13
Views: 4,712
Posted By sven
This is the second answer from hjasak: Close...

This is the second answer from hjasak:

Close + you should really know this. Here goes:

- a simple re-ordering:

b & W + W & b = b & (W + W^T);

By definition:
- (W + W^T) is a symmetric...
Forum: OpenFOAM September 17, 2009, 15:24
Replies: 13
Views: 4,712
Posted By sven
Hello Mr Jasak, thank you for your answer. I...

Hello Mr Jasak,

thank you for your answer. I apologize, because I forgot the definition of b, here is another implementation, where it probably becomes clearer, what I did.:


...
Forum: OpenFOAM September 17, 2009, 15:22
Replies: 13
Views: 4,712
Posted By sven
This is the first answer from hjasak

This is the first answer from hjasak
Forum: OpenFOAM September 17, 2009, 15:20
Replies: 13
Views: 4,712
Posted By sven
Dear Mr Jasak, I am a student of Aerospace...

Dear Mr Jasak,

I am a student of Aerospace Engineering, doing my master thesis at the University of California in Davis. For my thesis, I try to implement a new turbulence model in OpenFoam. For...
Forum: OpenFOAM September 17, 2009, 15:18
Replies: 13
Views: 4,712
Posted By sven
Implementing new turbulence model

I want to implement a new turbulence model (Dafalias-Younis) into OpenFOAM. This turbulence model is a Reynolds Stress model, which models the pressure-strain correlation Phi as shown in equation...
Showing results 1 to 12 of 12

 
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