[jcw]

Hello!


I would like to start a run-time post-processing: The output should be the 'uniformity index' (UI) with respect to velocity at a certain outlet patch. The problem is: How do I implement at function with is evaluated during simulation run. I use OF4.1 and do not have swak4Foam installed.


Thanks for advise!

[clapointe]

You can create a custom function object and put it in controlDict. It will be compiled and used at runtime. See :

https://github.com/OpenFOAM/OpenFOAM...nctionObject.H.

Caelan

[Nealcaffrey]

Here is a code which you can add in your functions inside controlDict for a user plane or a sampled surface

UniformityIndex_User_Plane1
      {
     
	
	    enabled         yes;
	    type            surfaceFieldValue;
	    
	    libs            ("libfieldFunctionObjects.so");
	    writeControl    timeStep;
	    writeInterval   1;
	    log             true;
	    writeFields     false;
	    regionType      sampledSurface;
	    name            User_Plane1 ;  
		sampledSurfaceDict
            {
                
                type        sampledTriSurfaceMesh;
        	surface     User_Plane_P1.stl;
        	source      cells;  // sample cells or boundaryFaces
        	interpolate false;
            }
	    	operation       uniformity; //- options: sum, areaIntegrate

	  //  weightField     phi;
	  //scaleFactor 1.183;
	    fields
	    (
		U
	    );    
    }