drag force in two phase flow -- CFD Online Discussion Forums

November 18, 2005, 13:33	drag force in two phase flow	#1
Ken Guest Posts: n/a	Hi, I am modelling free-surface flow (air-water). I am wondering how the drag force is modelled,if I set both air and water to be continuous (inhomogeneous, standard free surface model) and use "free surface" option for interphase trasfer with a drag coefficient given. Does CFX use the same relation for the momentum transfer coefficient as that in mixture model, cd=function(CD, A)? where A is the interfacial area density, equal to the gradient of volume fraction when "free surface" option is used. Thanks!

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