[FlyBob91]

Hi to all,
which is the correct file format to set a boundary condition with GroovyBC starting from an external file? Which extension typare allowed?

Thanks for help!

[FlyBob91]

ok i found it accepts the .csv and the openFoam-format. I have to work with .csv format but it seems not to work. Maybe i made some mistake in the file boundary

    inlet1
    {
	type groovyBC ;

	fields
	(
	U
	);
	outOfBounds clamp;
        readerType csv
	fileName "$FOAM_CASE/tab.csv";
	hasHeaderLine 1;
	valueColumns 3;
    }

can someone control me the code?
Thanks!

[FlyBob91]

Ok i changed road and i decided to insertthe li directly in U file in ti manner:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.x                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    inlet1
    {
        type             fixedValue
	value nonuniform List<vector>
	36
(
(-0.00053044	0.20173	0.002039)
(-0.0023134	0.28452	0.0037276)
(-0.0020482	0.38684	0.0054303)
(0.0020481	0.38684	0.0054303)
(0.0023134	0.28452	0.0037276)
(0.00053044	0.20173	0.002039)
(-0.0011778	0.2555	0.0033889)
(-0.0037739	0.3664	0.0060664)
(-0.003185	0.50186	0.0089382)
(0.003185	0.50186	0.0089382)
(0.0037739	0.3664	0.0060664)
(0.0011778	0.2555	0.0033889)
(-0.0013859	0.31758	0.0023695)
(-0.0047678	0.45854	0.0042026)
(-0.0040748	0.62904	0.006223)
(0.0040748	0.62904	0.006223)
(0.0047678	0.45854	0.0042026)
(0.0013859	0.31758	0.0023695)
(-0.0013859	0.31758	-0.0023695)
(-0.0047678	0.45854	-0.0042026)
(-0.0040748	0.62904	-0.006223)
(0.0040748	0.62904	-0.006223)
(0.0047678	0.45854	-0.0042026)
(0.0013859	0.31758	-0.0023695)
(-0.0011778	0.2555	-0.0033889)
(-0.0037739	0.3664	-0.0060664)
(-0.003185	0.50186	-0.0089382)
(0.003185	0.50186	-0.0089382)
(0.0037739	0.3664	-0.0060664)
(0.0011778	0.2555	-0.0033889)
(-0.00053044	0.20173	-0.002039)
(-0.0023134	0.28452	-0.0037276)
(-0.0020482	0.38684	-0.0054303)
(0.0020481	0.38684	-0.0054303)
(0.0023134	0.28452	-0.0037276)
(0.00053044	0.20173	-0.002039)
)
    }


    inlet2
    {
        type            fixedValue;
        value           uniform (0 -0.42 0);
    }

    outlet
    {
        type            zeroGradient;
    }

    walls
    {
        type           fixedValue;
        value          uniform (0 0 0);       
    }
}

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

however this error appear

--> FOAM FATAL IO ERROR: 
Essential entry 'value' missing

file: /home/roby/Scrivania/Tmixer_100/0/U.boundaryField.inlet1 from line 25 to line 26.

    From function Foam::fvPatchField<Type>::fvPatchField(const Foam::fvPatch&, const Foam::DimensionedField<Type, Foam::volMesh>&, const Foam::dictionary&, bool) [with Type = Foam::Vector<double>]
    in file lnInclude/fvPatchField.C at line 133.

FOAM exiting

any suggestion

[Dipsomaniac]

Looks like you are missing a semi colon after your bracket which containers the list of vectors.

[FlyBob91]

Originally Posted by Dipsomaniac

Looks like you are missing a semi colon after your bracket which containers the list of vectors.

Hi Brian,
thank you for your reply (you are saving my life in these days). I also forgotthe semi colon after "fixedValue"

here the code corected

boundaryField
{
    inlet1
    {
        type             fixedValue;
	value 		 nonuniform List<vector>
	36
(
(-0.00053044	0.20173	0.002039)
(-0.0023134	0.28452	0.0037276)
(-0.0020482	0.38684	0.0054303)
(0.0020481	0.38684	0.0054303)
(0.0023134	0.28452	0.0037276)
(0.00053044	0.20173	0.002039)
(-0.0011778	0.2555	0.0033889)
(-0.0037739	0.3664	0.0060664)
(-0.003185	0.50186	0.0089382)
(0.003185	0.50186	0.0089382)
(0.0037739	0.3664	0.0060664)
(0.0011778	0.2555	0.0033889)
(-0.0013859	0.31758	0.0023695)
(-0.0047678	0.45854	0.0042026)
(-0.0040748	0.62904	0.006223)
(0.0040748	0.62904	0.006223)
(0.0047678	0.45854	0.0042026)
(0.0013859	0.31758	0.0023695)
(-0.0013859	0.31758	-0.0023695)
(-0.0047678	0.45854	-0.0042026)
(-0.0040748	0.62904	-0.006223)
(0.0040748	0.62904	-0.006223)
(0.0047678	0.45854	-0.0042026)
(0.0013859	0.31758	-0.0023695)
(-0.0011778	0.2555	-0.0033889)
);
    }
.............

Best Regards,
Roberto

[FlyBob91]

Sorry for the bump.
The list vector works good but, because i have to work with a large number of vectors, i would like to load them directly starting from my csv file. The condition is not timevarying but fixed.
Any suggestion?


this is what i write till now

      inlet1
    {
      type            fixedValue;
      uniformValue    csvFile; 
     
      csvFileCoeffs
      {
   	 fileName         "$FOAM_CASE/tab"
   	 outOfBounds      clamp;
   	 hasHeaderLine    true;
    	// refColumn        0; i don't hav refColumn because it's not time Varying
    	 componentColumns (0 1 2); 
       }
    }

here the error

--> FOAM FATAL IO ERROR: 
Essential entry 'value' missing

file: /home/roby/Scrivania/ciao/0/U.boundaryField.inlet1 from line 26 to line 35.

    From function Foam::fvPatchField<Type>::fvPatchField(const Foam::fvPatch&, const Foam::DimensionedField<Type, Foam::volMesh>&, const Foam::dictionary&, bool) [with Type = Foam::Vector<double>]
    in file lnInclude/fvPatchField.C at line 133.

FOAM exiting

this is strange because i followed the instructions in http://openfoam.org/release/2-1-0/bo...ime-dependent/
the guide is for timedipendent BC but i think it can ru also for fixedValue.

i link also the file

[Dipsomaniac]

Hi Roberto

Looks like you need to still add

value uniform (0 0 0);

after you have read in your CSV file. I am assuming it won't be used in the calculation and is just a place holder, but is required for the boundary condition to still be read correctly.

Regards,
Brian

Like this.

      inlet1
    {
      type            fixedValue;
      uniformValue    csvFile; 
     
      csvFileCoeffs
      {
   	 fileName         "$FOAM_CASE/tab"
   	 outOfBounds      clamp;
   	 hasHeaderLine    true;
    	// refColumn        0; i don't hav refColumn because it's not time Varying
    	 componentColumns (0 1 2); 
       }

      value uniform (0 0 0);
    }

[FlyBob91]

Originally Posted by Dipsomaniac

Hi Roberto
after you have read in your CSV file. I am assuming it won't be used in the calculation and is just a place holder, but is required for the boundary condition to still be read correctly.

Hi Brian,
Thanks for your fast reply but, unfortunately, with this modification it works but it takes a null velocity boundary condition

Best Regards,
Roberto

[Dipsomaniac]

I am thinking that the fixedValue boundary condition can't be directly used with a CSV (external) file unfortunately. I am looking at other boundary conditions which may work for your purpose.

[gschaider]

Originally Posted by FlyBob91

Hi Brian,
Thanks for your fast reply but, unfortunately, with this modification it works but it takes a null velocity boundary condition

Best Regards,
Roberto

In the second post you were not tthat far off: The lookuptable would work like this (adapt for your own need)

inlet {
  type groovyBC;
  valueExpression "profile(pos().y)*normal()";
  lookuptables (
     {
          name profile;
          readerType csv;
          fileName "$FOAM_CASE/profile.csv";
          outOfBounds clamp;
          timeColumn 0;
          valueColumns (1);
      }
  );
}

Have a look at the Examples/groovyBC/wobbler/0/D-file and the Documentation/swak4FoamReference.org in the swak4Foam-sources

[FlyBob91]

hi Bernhard, Thank you for you reply and contribution.
You were very clear, but i have only a last doubt about how setting the time column if i have a non time varying input field.


Best Regards,
Roberto

[gschaider]

Originally Posted by FlyBob91

hi Bernhard, Thank you for you reply and contribution.
You were very clear, but i have only a last doubt about how setting the time column if i have a non time varying input field.


Best Regards,
Roberto

"timeColumn" is just a name for the number of the column with the independent variable. It is named like this for historical reasons