[Jingxue Wang]

Dear all

I am simulating the wind pressures on buildings using LES in OpenFoam 3.0.1. I can input yPlus -latesttime and then the yPLus comes out. Now I want to see the the y+ in each time step and output its value together with residules. How can I do this?

I heard from somebody that I can input: simpleFoam -postProcess -func yPlus -time XX at the terminal when preforming calculation. But the errors always occur like this:

olmati@PO2:~/OpenFOAM/olmati-3.0.1/run/Wangjingxue/Flatroof5$ simpleFoam -postProcess -func yPlus

Usage: simpleFoam [OPTIONS]
options:
  -case <dir>       specify alternate case directory, default is the cwd
  -noFunctionObjects
                    do not execute functionObjects
  -parallel         run in parallel
  -roots <(dir1 .. dirN)>
                    slave root directories for distributed running
  -srcDoc           display source code in browser
  -doc              display application documentation in browser
  -help             print the usage

Using: OpenFOAM-3.0.1 (see www.OpenFOAM.org)
Build: 3.0.1-119cac7e8750



--> FOAM FATAL ERROR: 
Wrong number of arguments, expected 0 found 1
Invalid option: -postProcess
Invalid option: -func

Could somebody has this exprience for this? I will really appreciate any help and suggestions.

[Jingxue Wang]

Could somebody have this experience before?Thanks in advance!

Originally Posted by Jingxue Wang

Dear all

I am simulating the wind pressures on buildings using LES in OpenFoam 3.0.1. I can input yPlus -latesttime and then the yPLus comes out. Now I want to see the the y+ in each time step and output its value together with residules. How can I do this?

I heard from somebody that I can input: simpleFoam -postProcess -func yPlus -time XX at the terminal when preforming calculation. But the errors always occur like this:

olmati@PO2:~/OpenFOAM/olmati-3.0.1/run/Wangjingxue/Flatroof5$ simpleFoam -postProcess -func yPlus

Usage: simpleFoam [OPTIONS]
options:
  -case <dir>       specify alternate case directory, default is the cwd
  -noFunctionObjects
                    do not execute functionObjects
  -parallel         run in parallel
  -roots <(dir1 .. dirN)>
                    slave root directories for distributed running
  -srcDoc           display source code in browser
  -doc              display application documentation in browser
  -help             print the usage

Using: OpenFOAM-3.0.1 (see www.OpenFOAM.org)
Build: 3.0.1-119cac7e8750



--> FOAM FATAL ERROR: 
Wrong number of arguments, expected 0 found 1
Invalid option: -postProcess
Invalid option: -func

Could somebody has this exprience for this? I will really appreciate any help and suggestions.

[ykanani]

Originally Posted by Jingxue Wang

Could somebody have this experience before?Thanks in advance!

Hello,
The postProcess option with the syntax that you are trying to use is available in later OpenFOAM versions ( I think after version 4). Furthermore, it does not do what you want. In later versions, that is the syntax for calculating yplus after your job is done (which is the same as using yplus command in OpenFOAM 3)

To write yplus values in all output timesteps and log its values (mean,min and max) into a log file inside the postProcessing folder, you need to use it as a function object inside the controlDict file. Something similar to the following:

functions
{

 yplus
 {
   type yplus;
   functionObjectLibs ("libutilityFunctionObjects.so");
   writeControl outputTime;
   writeIntervals 1;
   log  true;
 }
......(other functions such as averaging,etc)

}

I cannot test this since I don’t have that version installed. But hopefully it does the job for you.

Regards

[Jingxue Wang]

Originally Posted by ykanani

Hello,
The postProcess option with the syntax that you are trying to use is available in later OpenFOAM versions ( I think after version 4). Furthermore, it does not do what you want. In later versions, that is the syntax for calculating yplus after your job is done (which is the same as using yplus command in OpenFOAM 3)

To write yplus values in all output timesteps and log its values (mean,min and max) into a log file inside the postProcessing folder, you need to use it as a function object inside the controlDict file. Something similar to the following:

functions
{

 yplus
 {
   type yplus;
   functionObjectLibs ("libutilityFunctionObjects.so");
   writeControl outputTime;
   writeIntervals 1;
   log  true;
 }
......(other functions such as averaging,etc)

}

I cannot test this since I don’t have that version installed. But hopefully it does the job for you.

Regards

Dear ykanani

Thank you so much!I understand what you mean.

I tested in my computer and it worked successfully only changing yplus to yPlus.

Thank you so much!

Regards