Numerical Tests for the Lift, Wall Lubrication, and Turbulence Dispersion Forces in the CUPID

In a two phase flow momentum equation, the most important term to be modeled by a constitutive relation is the generalized drag force which specifies the interfacial surface forces. This force can be formulated as the linear combination of various known interfacial forces as a sum of the standard drag force, the lift force, the wall lubrication force, the turbulent dispersion force, and so on. In the current version of CUPID, the standard drag force and the virtual mass force have been implemented, but the lift force, the wall lubrication force, and the turbulence dispersion force were omitted temporally. In this paper these three forces were implemented and tested