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-   -   Alpha gradient definition in multiphaseInterFoam ?! (https://www.cfd-online.com/Forums/openfoam-programming-development/193159-alpha-gradient-definition-multiphaseinterfoam.html)

behzad-cfd September 18, 2017 10:48
Alpha gradient definition in multiphaseInterFoam ?!
 
Hi,
In multiphaseInterFoam, surfaceTentionForce() function, gradient of alpha definition is
Code:
*(

fvc::interpolate(alpha2)*fvc::snGrad(alpha1)

- fvc::interpolate(alpha1)*fvc::snGrad(alpha2)

)
But in interFoam it's simply fvc::snGrad(alpha1).

I know in first case we have an alpha per phase, my question is about origin of such a definition.

behzad-cfd September 19, 2017 12:20
Actually i want to couple VOF with level-set based on multiphaseInterFoam solver. can i define gradient of psi field (level-set field) in similar way?:confused:

Thanks in advance,


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