Effect of the type of boundary conditions on the three-phase contact line on the flow characteristics during filling of the channel

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.

Influence of flow–fiber coupling during mold-filling on the stress field in short-fiber reinforced composites

“…( 6) is described in detail. As discussed in the literature, e.g., [53,[77][78][79], the three-phase contact point (TPCP) shown in Fig. 2 is critical in view of stress singularities.…”

Kinematics of the fountain flow during pipe filling with a power‐law fluid

“…It is assumed that the flow regime and the phase interaction behavior at the contact line correspond to the contact angle equal to π . Using the above‐mentioned boundary conditions allow avoiding the singularity of generally accepted problem statement, and simultaneously, it has insignificant impact on the flow kinematics except for the small area near contact point …”

“…This circumstance should be taken into account when developing a numerical algorithm. The problem of the contact line dynamics and the applicable solution methods is discussed in the works . A present‐day state of the problem and the corresponding approaches for solving is reported in details in the article …”