BC at 2-phase interface ?

July 26, 2001, 03:15

Hi all. In two-phase flow, (I wanna use modified VOF scheme such like a SURFER, or HRIC ....)

doesn't it need any pressure or velocity boundary conditions at interface ? (It just depends on discretization scheme ?)

reply plz...

July 26, 2001, 05:32

You are right, and in SURFER, you have a term which accounts for the capillary force which is realized by a volume fraction.

July 26, 2001, 11:19

The interfacial boundary conditions are taken care of within the one-Fluid formulation, with some simplifications of course..

Read: Kataoka (1986) Local Instant Formulation of 2-phase flow. International Journal o

Multiphase flow v12(5)pp745-768

A more of an engineering derivation (from a slightly different approach) can be found in a thesis of W. Sabisch from Karlsruhe. I think their was a paper by him also at the ICMF2001 conference.

I would suggest trying to derive the equations from scratch to really understand where they come from and what exactly their limitations are...

Happy VOFing...

August 27, 2001, 06:54

Hi I developed CFD code for spray evaporation and mixing in cylandrical duct . therefor I need experimental data of spray evaporation in duct for validated my coed ,if you have such data please send for me . thank's

July 26, 2001, 03:15	BC at 2-phase interface ?	#1
xaz Guest Posts: n/a	Hi all. In two-phase flow, (I wanna use modified VOF scheme such like a SURFER, or HRIC ....) doesn't it need any pressure or velocity boundary conditions at interface ? (It just depends on discretization scheme ?) reply plz...

July 26, 2001, 05:32	Re: BC at 2-phase interface ?	#2
JunseokKim Guest Posts: n/a	You are right, and in SURFER, you have a term which accounts for the capillary force which is realized by a volume fraction.

July 26, 2001, 11:19	Re: BC at 2-phase interface ?	#3
NAME Guest Posts: n/a	The interfacial boundary conditions are taken care of within the one-Fluid formulation, with some simplifications of course.. Read: Kataoka (1986) Local Instant Formulation of 2-phase flow. International Journal o Multiphase flow v12(5)pp745-768 A more of an engineering derivation (from a slightly different approach) can be found in a thesis of W. Sabisch from Karlsruhe. I think their was a paper by him also at the ICMF2001 conference. I would suggest trying to derive the equations from scratch to really understand where they come from and what exactly their limitations are... Happy VOFing...

August 27, 2001, 06:54	spray evaporation	#4
M.jangi Guest Posts: n/a	Hi I developed CFD code for spray evaporation and mixing in cylandrical duct . therefor I need experimental data of spray evaporation in duct for validated my coed ,if you have such data please send for me . thank's

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