[katakgoreng]

Hi Niels,

Do you have any experience using the function object to calculate force and moment due to waves?
I tried using the following function object

functions
{

    forces
    {
        type            	forces;
        functionObjectLibs 	("libforces.so");
        outputControl   	timeStep;
        outputInterval  	2;
        patches        		(cylinder);
        pName       		p_rgh;
        UName       		U;
        log         		true;
	rhoName			rho;
        rhoInf      		1000;
	nuInf			1e-6;
        CofR        		( 0 0 -1.2 );
    }
}

and got the following error:

--> FOAM FATAL IO ERROR: 
keyword nu is undefined in dictionary "/Works/WALL_COARSE/constant/transportProperties"

file: /Works/WALL_COARSE/constant/transportProperties from line 25 to line 37.

    From function dictionary::lookupEntry(const word&, bool, bool) const
    in file db/dictionary/dictionary.C at line 402.

FOAM exiting

My transport properties dictionary is as follows

FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      transportProperties;
}

phase1
{
    transportModel  Newtonian;
    nu              nu [ 0 2 -1 0 0 0 0 ] 1e-06;
    rho             rho [ 1 -3 0 0 0 0 0 ] 1000;
}

phase2
{
    transportModel  Newtonian;
    nu              nu [ 0 2 -1 0 0 0 0 ] 1.48e-05;
    rho             rho [ 1 -3 0 0 0 0 0 ] 1;
}

sigma           sigma [1 0 -2 0 0 0 0] 0.07;

Kind regards,
katakgoreng

[JGadelho]

Hello katakgoren,

I believe you have to define nu and rho before phase1 and phase2.

Try to add the red lines before phase1 in transporte properties:

transportModel  Newtonian;   
nu              nu [ 0 2 -1 0 0 0 0 ] 1e-06; 
rho             rho [ 1 -3 0 0 0 0 0 ] 1000; 

phase1 
{     
transportModel  Newtonian;     
nu              nu [ 0 2 -1 0 0 0 0 ] 1e-06;     
rho             rho [ 1 -3 0 0 0 0 0 ] 1000; 
}  
phase2 
{     
transportModel  Newtonian;     
nu              nu [ 0 2 -1 0 0 0 0 ] 1.48e-05;     
rho             rho [ 1 -3 0 0 0 0 0 ] 1; 
}

[CFD-Palma]

Hi katakgoren,

In my case it works and I have only two differences:

In transportproperties after sigma
transportModel Newtonian;
nu nu [ 0 2 -1 0 0 0 0 ] 1e-06;

In Controldict I do not have reference to nu:

forces
{
type forces;
functionObjectLibs ("libforces.so");
patches (hull);
rhoName rho;
rhoInf 1025;
CofR (2.5 0 0.25);
outputControl timeStep;//outputTime;//
outputInterval 100;
log true;
}

Regards,
Carlos.

[katakgoreng]

Many thanks for the help.