How to apply a shear stress on a fluid-fluid interface (VOF)

cfdstar · November 20, 2018, 12:41

Hi,

I wanted to impose a shear force (let's say $\tau$ ) coming from an external source on a fluid-fluid interface using the VOF method as a volumetric momentum source term. How can I define the momentum source terms for this purpose in UDF to apply shear forces which are tangent to the interface? How can I determine and map those volumetric forces in the tangential directions?

Any comments are highly appreciated.

hl1019969142 · November 4, 2023, 06:46

Quote:

Originally Posted by cfdstar

Hi,

I wanted to impose a shear force (let's say $\tau$ ) coming from an external source on a fluid-fluid interface using the VOF method as a volumetric momentum source term. How can I define the momentum source terms for this purpose in UDF to apply shear forces which are tangent to the interface? How can I determine and map those volumetric forces in the tangential directions?

Any comments are highly appreciated.

hello,did you solved this problem?

November 20, 2018, 12:41	How to apply a shear stress on a fluid-fluid interface (VOF)	#1
cfdstar New Member Join Date: Aug 2017 Posts: 20 Rep Power: 8	Hi, I wanted to impose a shear force (let's say $\tau$ ) coming from an external source on a fluid-fluid interface using the VOF method as a volumetric momentum source term. How can I define the momentum source terms for this purpose in UDF to apply shear forces which are tangent to the interface? How can I determine and map those volumetric forces in the tangential directions? Any comments are highly appreciated.

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