Liquid entrainment by gas flow along the interface of a liquid bridge

Abstract

Abstract. We report the results of numerical and experimental studies of two-phase flows in an annulus. The geometry corresponds to a cylindrical liquid column co-axially placed into an outer cylinder with solid walls. Gas enters into the annular duct and entrains the initially quiescent liquid. The internal column consists of solid rods at the bottom and top, while the central part is a liquid bridge from a viscous liquid and kept in its position by surface tension. Silicone oil 5cSt was used as a test liquid and air and nitrogen as gases. An original numerical approach was developed to study the problem in complex geometry. The flow structure in the liquid is analyzed for a wide range of gas flow rates.

High-Prandtl-number thermocapillary liquid bridges with dynamically deformed interface: effect of an axial gas flow on the linear stability

“…Furthermore, when the dynamic viscosity of the liquid is more than 100 times that of the gas, the strength of the vortex scales linearly with the gas flow Reynolds number , based on the mean gas velocity and twice the width of the air gap. Similar results were reported by Gaponenko, Miadlun & Shevtsova (2011 b ). Gaponenko et al.…”

Retracted article – Experimental study on dynamic deformation of free surface under surrounding gas flow

“…In physical experiments, we use the ideal isothermal model to improve the quality of silicon crystal. Deformation of an isothermal interface is extremely related to a co-axial gas flow when enter from the bottom to the top, which was discussed by Gaponenko [1,2] , and they reported that the linear velocity of gas almost determined the free surface deformation. The tendency that surface deformation grows with the volume ratio V quasi-linearly was predicted by Gaponenko [3] .…”