[Siassei]

Hello,

in the phaseProperties dict I will set a temperatureDependent surfaceTension with expression value.
Variable Def
Expression usage

Quick example

surfaceTension
(
    (gas and liquid)
    {
        type            temperatureDependent;
        sigma
        {
            type        temperatureDependent;
            sigma
            {
                type expression;

                variables
                (
                    "B = 1"
                    "Tc = 2"
                );
                expression
                #{
                    arg() * Tc + B
                #};
            }
        }
    }
);

I get the followed error. (If I remove the variables definition and subsitute the variables into the expression than everything works)

running decomposePar on /data
[0] [3] 
[3] 
[3] --> FOAM FATAL IO ERROR: 
[3] Expected a '(' while reading Tuple2, found on line 0: error
[3] 
[3] 
[3] file: IOstream at line 0.
[3] 
[3]     From bool Foam::Istream::readBegin(const char*)
[3]     in file db/IOstreams/IOstreams/Istream.C at line 116.
[3] 
FOAM parallel run exiting

I use the solver

icoReactingMultiphaseInterFoam -version
Using: OpenFOAM-v2006 (2006) - visit www.openfoam.com
Build: 5dc04530d9-20200714

[Siassei]

I had fixed.
Remove the first type qualif.
(remove line 5 of my short example)

[OPFO]

Hi Thomas,

Thank you for sharing your code for temperature dependent surface tension!

Do you know how to call the solid volume fraction in the icoReactingMultiphaseInterFoam solver for use in an equation (e.g. TEqn)?

In Interfoam, it is simply alpha1 or alpha2, but due to the multiphase nature of the icoReactingMultiphaseInterFoam solver, everything is kind of confusing because of phase pairs and the entire fluid references.

Any help is appreciated!

[Pavithra]

Originally Posted by Siassei

Hello,

in the phaseProperties dict I will set a temperatureDependent surfaceTension with expression value.
Variable Def
Expression usage

Quick example

surfaceTension
(
    (gas and liquid)
    {
        type            temperatureDependent;
        sigma
        {
            type        temperatureDependent;
            sigma
            {
                type expression;

                variables
                (
                    "B = 1"
                    "Tc = 2"
                );
                expression
                #{
                    arg() * Tc + B
                #};
            }
        }
    }
);

I get the followed error. (If I remove the variables definition and subsitute the variables into the expression than everything works)

running decomposePar on /data
[0] [3] 
[3] 
[3] --> FOAM FATAL IO ERROR: 
[3] Expected a '(' while reading Tuple2, found on line 0: error
[3] 
[3] 
[3] file: IOstream at line 0.
[3] 
[3]     From bool Foam::Istream::readBegin(const char*)
[3]     in file db/IOstreams/IOstreams/Istream.C at line 116.
[3] 
FOAM parallel run exiting

I use the solver

icoReactingMultiphaseInterFoam -version
Using: OpenFOAM-v2006 (2006) - visit www.openfoam.com
Build: 5dc04530d9-20200714

Hello,
Thanks for sharing ur expression.
Could you please explain what does arg() means in your expression ?
Thank you.

[rupak504]

Originally Posted by Pavithra

Hello,
Thanks for sharing ur expression.
Could you please explain what does arg() means in your expression ?
Thank you.

have you figured out what is that arg() for? my first guess would be temperature.

[olesen]

Originally Posted by rupak504

have you figured out what is that arg() for? my first guess would be temperature.

The 'arg()' in the expression simply represents the argument 'x' passed into a Function1 value(const scalar x)


https://www.openfoam.com/documentati...Function1.html