Effect of the Type of Boundary Conditions on the Three-Phase Contact Line on the Flow Characteristics during Filling of the Channel
E. I. Borzenko, G. R. Shrager
Tomsk State University, Tomsk, 634050 Russia
Keywords: three-phase contact line, free boundary, no-slip, slip, calculation method, dissipation function, shear stress, convergence
Abstract
The effect of various models of the dynamics of the three-phase contact line on the flow characteristics during filling of a plane channel is investigated. The system of constitutive equations is solved numerically using a technique based on the combined use of the SIMPLE algorithm and the method of invariants. Different methods for calculating the motion of the contact point for slip and no-slip conditions for a dynamic contact angle θ = π, neglecting surface tension on the free boundary are considered. It is shown that in the whole computational domain, except in a small vicinity of the contact point, the kinematic characteristics of the flow and the distributions of the dissipation function and shear stress are slightly dependent on the selected calculation method of the motion of the contact point.
DOI: http://dx.doi.org/10.1134/S0021894415020017
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