Run function objects on final time

b.simpson · December 11, 2020, 07:15

Hi all,

I am running a range of natural ventilation simulations. I have a handful of function objects and two surfaces files that I want to run on the final time/iteration of the simulation once my convergence criteria has been met.

The problem I am having is that when the simulation converges some of my function objects and my two surface files are not getting updated with the results from the final simulation time. The probes and residual function objects are updated correctly at the end of the simulation but my four volFieldValue, FieldMinMax and surface files are not.

Does anyone know if there is a method by which I can either get my simulation to run all my function objects at time of convergence or re-run them after the simulation has finished?

The postProcessing folder is updated correctly with all my function objects and surface files values at the declared writeIntervals in the controlDict. Ideally, I want to find a way for the simulation to automatically update the postProcessing folder at the end of the simulation instead of me having to manually change the writeInterval when the simulation gets close to converging.

I have looked into the postProcess tool but when I use the -list command their is no volFieldValue in the list of function objects. So I am not sure if that function object is available for use with the postProcess tool.

I am using OpenFOAM 8 on Ubuntu 18.04.2. I am running buoyantSimpleFoam in parallel on 6 processors. My simulations are converging correctly and the reconstruct process appears to be working as intended.

Thank you in advance for any support you can provide me.

Kind regards,

Ben

My controlDict:

Code:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v1812                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  | Model:    VE_Practice                           |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

application     buoyantSimpleFoam;

startFrom       latestTime;

startTime       0;

stopAt          endTime;

endTime         10000;

deltaT          1;

writeControl    timeStep;

writeInterval   1000;

purgeWrite      3;

writeFormat     ascii;

writePrecision  8;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable true;

functions
{
	#include "surfaces"
	#include "surfaces2"
	  
	CO2
		{
			type    			scalarTransport;
			libs 				("libsolverFunctionObjects.so");
			writeControl       	timeStep;
			writeInterval      	1;
			active          	true;
			autoSchemes     	false;
			nCorr           	0;
			resetOnStartUp 		false;
			field				CO2;
			fvOptions       
			{
			 
			}
		}
		
	comfortAnalysis
		{
			type            comfort;
			libs            ("libfieldFunctionObjects.so");
			
			metabolicRate	1.2;
			clothing		0.7;
			extWork			0.0;

			executeControl  writeTime;
			writeControl    writeTime;

		}
		
	AoA
		{
			type    scalarTransport;
			libs 	("libutilityFunctionObjects.so");
			enabled true;
			writeControl writeTime;
			log yes;
			nCorr 1;

			field AoA;
			active          true;
			autoSchemes     false;
			resetOnStartUp false;
			DT              1e-5;
			nCorr 0;

			fvOptions
			{
				IncrementTime
				{
					type            semiImplicitSource;
					active          true;
					selectionMode all;
					volumeMode  specific;
					sources
					{
						AoA
						{
							explicit 1;
							implicit 0;
						}
					}
				}
			}
		}
		
	fieldMinMax
		{
			type                fieldMinMax;
			libs  				("libfieldFunctionObjects.so");
			log                 yes;
			writeControl       	writeTime;
			//writeInterval      	1;
			//mode              magnitude;
			fields             	( U p T rho CO2 AoA);
		}
		
	breathingZoneAverages
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		volAverage;

			fields
			(
				T
				CO2
				U
				PMV
				PPD
				AoA
			);
		}
		
	breathingZoneValuesAvg
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		average;

			fields
			(
				T
				CO2
				U
				PMV
				PPD
				AoA
			);
		}
		
	breathingZoneValuesSum
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		sum;

			fields
			(
				CO2
			);
		}
	
	spaceAverage
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			spaceZone;
			
			operation		volAverage;

			fields
			(
				T
				CO2
				U
				AoA
			);
		}
	
	residuals
    {
        type            residuals;
        functionObjectLibs ("libutilityFunctionObjects.so");
        enabled         true;
        writeControl   timeStep;
        writeInterval  1;

        fields
        (
            p_rgh
            U
            k
            omega
			CO2
			e
        );
    }
	
	probes
    {
        type            probes;
        libs            ("libsampling.so");
        writeControl    timeStep;
        writeInterval   1;

        fields
        (
            p_rgh
			U
			T
			CO2
			k
			omega
        );

        probeLocations
        (
            (2.55 1.3 1.5)		//convergence point
        );

    }
}

// ************************************************************************* //

My surface file:

Code:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v1812                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/

surfaces
{
    type            surfaces;
    libs            ("libsampling.so");
    writeControl    writeTime;

    surfaceFormat   raw;
    fields          (U T CO2 AoA);

    interpolationScheme cell;

    surfaces
    (
		NorthSlice
        {
            type            cuttingPlane;
            planeType       pointAndNormal;
            pointAndNormalDict
            {
                point   (0 5.15 0);
                normal  (0 1 0);
            }
            interpolate     false;
        }
		SouthSlice
        {
            type            cuttingPlane;
            planeType       pointAndNormal;
            pointAndNormalDict
            {
                point   (0 0.05 0);
                normal  (0 1 0);
            }
            interpolate     false;
        }		
    );
}


// ************************************************************************* //

saurabh1011 · September 15, 2022, 04:43

Hi,

Did you find solution to your problem? I have the same problem.

b.simpson · September 16, 2022, 06:19

Hi,

I was unable to find a perfect solution to this problem. So what I have done is after the simulation has converged but before performing the reconstruction tasks I re-ran the solver (buoyantSimpleFoam in my case) but with an edited/updated controlDict file.

In the controlDict, I made sure the startFrom was set to latestTime. I removed the startTime and set the writeInterval to 10. I also increased the endTime abit (by 200 in my case) just in case the simulation didn't converge.

This then re-ran buoyantSimpleFoam from the converged solution but writing all my results every 10 iterations. My simulations usual re-converged very quickly, so it didn't take me too much extra time. Then when they re-converged I had results written out within a few iterations of the final convergence.

This does not seem like a proper solution to the problem but it was the best work around I was able to come up with.

I will include my edited/second controlDict in case that helps, but it will be abit different as my models have changed abit since I created this thread.

I hope this helps.

Regards,

Ben

Code:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v1812                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  | Model:    VE_Practice                           |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

application     buoyantSimpleFoam;

startFrom       latestTime;

stopAt          endTime;

endTime         5200;

deltaT          1;

writeControl    timeStep;

writeInterval   10;

purgeWrite      3;

writeFormat     ascii;

writePrecision  8;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable true;

/*libs (
      "libOpenFOAM.so"
      "libsimpleSwakFunctionObjects.so"
      "libswakFunctionObjects.so"
      "libgroovyBC.so"
     );*/

functions
{
	#include "surfaces"
	#include "surfaces2"
	  
	CO2
		{
			type    			scalarTransport;
			libs 				("libsolverFunctionObjects.so");
			writeControl       	timeStep;
			writeInterval      	1;
			active          	true;
			autoSchemes     	false;
			nCorr           	0;
			resetOnStartUp 		false;
			field				CO2;
			fvOptions       
			{
				generalSource
				{
					type            semiImplicitSource;
					active          true;
					selectionMode	cellZone;
					cellZone		spaceZone;
					volumeMode		absolute;
					sources
					{
						CO2
						{
							explicit	1;
							implicit	0;
						}
					}
				}
			}
		}
		
	comfortAnalysis
		{
			type            comfort;
			libs            ("libfieldFunctionObjects.so");
			
			metabolicRate	1.2;
			clothing		0.7;
			extWork			0.0;

			executeControl  writeTime;
			writeControl    writeTime;

		}
		
	AoA
		{
			type    scalarTransport;
			libs 	("libutilityFunctionObjects.so");
			enabled true;
			writeControl writeTime;
			log yes;
			nCorr 1;

			field AoA;
			active          true;
			autoSchemes     false;
			resetOnStartUp false;
			DT              1e-5;
			nCorr 0;

			fvOptions
			{
				IncrementTime
				{
					type            semiImplicitSource;
					active          true;
					selectionMode all;
					volumeMode  specific;
					sources
					{
						AoA
						{
							explicit 1;
							implicit 0;
						}
					}
				}
			}
		}
	
	fieldMinMax
		{
			type                fieldMinMax;
			libs  				("libfieldFunctionObjects.so");
			log                 true;
			writeControl       	writeTime;
			//writeInterval      	1;
			//mode              magnitude;
			fields             	( U p T rho CO2 AoA);
		}
		
	breathingZoneAverages
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		volAverage;

			fields
			(
				T
				CO2
				U
				PMV
				PPD
				AoA
			);
		}
		
	breathingZoneValuesAvg
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		average;

			fields
			(
				T
				CO2
				U
				PMV
				PPD
				AoA
			);
		}
		
	breathingZoneValuesSum
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			breathingZone;
			
			operation		sum;

			fields
			(
				T
				CO2
				U
				PMV
				PPD
				AoA
			);
		}
	
	spaceVolAverage
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			spaceZone;
			
			operation		volAverage;

			fields
			(
				T
				CO2
				U
				AoA
			);
		}
		
	spaceAverage
		{
			type            volFieldValue;
			libs            ("libfieldFunctionObjects.so");
			log				true;
			writeControl    writeTime;
			writeFields		true;
			
			regionType		cellZone;
			name			spaceZone;
			
			operation		average;

			fields
			(
				T
				CO2
				U
				AoA
			);
		}
	
	residuals
    {
        type            residuals;
        functionObjectLibs ("libutilityFunctionObjects.so");
        enabled         true;
        writeControl   timeStep;
        writeInterval  1;

        fields
        (
            p_rgh
            U
            nuTilda
			CO2
			e
			AoA
        );
    }
	
	probes
    {
        type            probes;
        libs            ("libsampling.so");
        writeControl    timeStep;
        writeInterval   1;

        fields
        (
            p_rgh
			U
			T
			CO2
			nuTilda
			AoA
        );

        probeLocations
        (
            (1.6 3.1 2)		//convergence point Occ1
			(3.1 3.1 2)		//convergence point Center
			(4.6 3.1 2)		//convergence point Occ2
        );

    }
}

// ************************************************************************* //

saurabh1011 · September 19, 2022, 20:09

Hi,

Thanks for the reply. Your solution might work for me even though it is not the best one.

Have a nice day!

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September 15, 2022, 04:43		#2
saurabh1011 New Member Saurabh Join Date: Nov 2017 Posts: 6 Rep Power: 8	Hi, Did you find solution to your problem? I have the same problem.

September 19, 2022, 20:09		#4
saurabh1011 New Member Saurabh Join Date: Nov 2017 Posts: 6 Rep Power: 8	Hi, Thanks for the reply. Your solution might work for me even though it is not the best one. Have a nice day!