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Showing results 1 to 15 of 15 Search took 0.00 seconds. Search: Posts Made By: florian_krause

Forum: OpenFOAM November 13, 2012, 08:53

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hello Sunxing, you should have mentioned which... Hello Sunxing, you should have mentioned which version of the utility you have used. Did you use the one Francois linked in post #41 ? Regards, Florian

Forum: OpenFOAM November 8, 2012, 10:03

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Let me explain - the primary purpose of the... Let me explain - the primary purpose of the utility was to print the max yPlus value so that I can judge how well my wall region is resolved (I added average and min yPlus cause it might be helpful...

Forum: OpenFOAM November 8, 2012, 07:59

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hi Francois, there you have the reason why... Hi Francois, there you have the reason why yPlus at the wall patch is practically zero :) y is zero because it is the wall distance... and well, since pipeWall-Up is the wall, it is zero of...

Forum: OpenFOAM November 8, 2012, 04:50

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hi Francois, what is written in timeDirectory/y... Hi Francois, what is written in timeDirectory/y at the pipeWall-Up patch? Regards, Florian

Forum: OpenFOAM July 11, 2011, 16:13

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause OK now I should say sorry for the non-sense... :(... OK now I should say sorry for the non-sense... :( It is a class, would have to check the documentation for the exact definition... but think it comes from the generic dimensioned Type class...

Forum: OpenFOAM July 11, 2011, 15:41

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause sorry for the confusion with UMean in the code... sorry for the confusion with UMean in the code snippet... I used the utility for a fully developed turbulent pipe flow and time-averaged the velocity field. With that I calculated the mean...

Forum: OpenFOAM July 11, 2011, 13:50

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Thats weird! I just run the pitzDaily case a few... Thats weird! I just run the pitzDaily case a few second until t=0.017 (random) and used my own plusPostLES utility-it works! Here are the relevant code snippets of my plusPostLES: int main(int...

Forum: OpenFOAM July 11, 2011, 07:40

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hi grandgo, my understanding is, kinematic... Hi grandgo, my understanding is, kinematic viscosity nu shouldn't be zero, since its a physical property, therefore nuEff is not zero. I also think that you should divide by nu and not nuEff even...

Forum: OpenFOAM July 11, 2011, 05:55

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hi grandgo, if its a division by zero, then its... Hi grandgo, if its a division by zero, then its definitely not in yPlus = y.y() * uTauAvg / RASModel->nu();or in nuEff what you are using. nu is non-zero as well as nuEff = nu + nu_t. By the way,...

Forum: OpenFOAM July 1, 2011, 10:19

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause I haven't downloaded and installed OF-2.0.0 yet,... I haven't downloaded and installed OF-2.0.0 yet, so I might be of limited help here... Anyway, if the plusPostRANS source is not modified, then the compiler seems to complain about...

Forum: OpenFOAM May 10, 2011, 13:07

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause @vaina74-what I mean is, if you use a high-Re... @vaina74-what I mean is, if you use a high-Re RANS model, as for instance standard k-eps RANS model, you will use wall functions and thus your first grid point normal to the wall will not be located...

Forum: OpenFOAM May 9, 2011, 03:56

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Hello Robert, my code calculates y+ as... Hello Robert, my code calculates y+ as defined here: http://www.cfd-online.com/Wiki/Dimensionless_wall_distance_%28y_plus%29 so, basically, my little utility calculates the wall normal...

Forum: OpenFOAM March 29, 2011, 10:50

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Dear Jose, I totally agree with you on the... Dear Jose, I totally agree with you on the point that the averaging over the wall is not usefull for your case. I have implemented that because I was studying, as said in the previous...

Forum: OpenFOAM March 28, 2011, 18:16

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause Dear Jose, thanks for your feedback! ... Dear Jose, thanks for your feedback! First I calculate y+ of the first grid point normal to the wall(s). I store the values in YpTemp and output the corresponding min, max, avg values on the...

Forum: OpenFOAM March 26, 2011, 05:30

Replies: 114 y+ and u+ values with low-Re RANS turbulence models: utility + testcase Views: 58,890 Posted By florian_krause y+ and u+ values with low-Re RANS turbulence models: utility + testcase Dear all, This issue was already discussed in some length in various threads. Therefore I finally reviewed and attached my plusPostRANS utility. It calculates y+ and u+ values when using one...

Showing results 1 to 15 of 15

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