[Harris_Daniel]

Dear OpenFOAM users,
I am trying to implement Marangoni effect within icoReactingMultiphaseInterFoam solver(OpenFOAM-v2012). Currently, I am trying to make use of the temperature dependent surface tension model within OpenFOAM. I have declared surface tension as follows in the phase properties file,

surfaceTension
(
    (solid and liquid)
    {
        type            temperatureDependent;
        sigma           constant 0.7;
    }

    (liquid and gas)
    {
        type            temperatureDependent;
        sigma           constant 0.05;
    }

    (gas and solid)
    {
        type            constant;
        sigma           0.0;//0
    }
);

But I am not sure if this evaluates surface tension based on change in temperature. Having a look at temperatureDependantSurfaceTension.C file, I conclude that the surface tension coefficient can be read from a dictionary but I am not sure how to use it. I know that the temperatureDependantSurfaceTension.C file computes surface tension coefficients based on Foam::Function1 which can read temperature dependent properties in a functional(polynomial, sine) form from either a dictionary or a csv file.

Question: Can someone please explain how to make use of this and define surface tension as a function of temperature?

Reference:
https://develop.openfoam.com/Develop...rfaceTension.C

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

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

[xiaomk]

Hello!

I have met the same problem, have you solved it ?

Regards,

Mingkun

[rupak504]

hi Harris and Xiao


were you able to solve this issue?


As far as i understand, there are two says to tackle this problem.


1. add the tangential stress term in the momentum equation.
2. or, this temperatureDependent, which depends upon the Function1, but how to add the polynomial function in the phaseProperties ?

surfaceTension
(
         (gas and liquid)
    {
        type            temperatureDependent;
        sigma           polynomial?;
        
        {
            sigmaCoeff ? 
        #{
                   
        #};
        
        }
    }

[mldrmz]

Hello
could you apply your changes? would you please share your achievement?