Moving Mesh Method for Two-Phase Flows with Dynamic Boundaries
Congress: ICMF
ABSTRACT:
Bubbles and drops dynamics through capillaries of variable cross-section still remains of considerable importance in two-phase flows through porous media. Experimental studies are found in the literature where the motion of immiscible bubbles in different fluids is investigated. Recovery of oil by chemical flooding, biological processes and crude oil transportation in through pipelines are examples of industry-related applications. We seek to study numerically the effects of the surface tension, bubble dynamics and channel geometry for two-phase flows in channels with variable cross-section using a moving mesh/boundary domain scheme, which dramatically shortens the domain length. Such a scheme moves the computational boundary nodes according to the variable cross-section of a given problem. In this work, we present several physical problems where the cross-sections change periodically or arbitrarily according to the geometry. The new methodology proposed to simulate two-phase flows in variable cross-sectioned channels shows good accuracy to describe interface forces and bubble dynamics in different complex geometries with moving boundaries.