University of Twente Student Theses


Drag reduction in two-phase Taylor-Couette flow

Franken, A.D. (2020) Drag reduction in two-phase Taylor-Couette flow.

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Abstract:It has long been known that the addition of gas bubbles into Taylor-Couette flow can lead to drag reduction; measured as a decrease in the global torque on the system. However, the precise physical mechanisms behind this are still not clear. In this study, a new numerical tool has been developed to simulate two-phase Taylor-Couette. The code is an extension of the TBFsolver, developed by dr. Paolo Cifani, which is adapted to the cylindrical geometry and the current problem setting. During the development of the code, various validation tests have been performed such as the pure advection of bubbles, and a single rising bubble in a cylindrical column. After validation, a simulation of 120 bubbles in the Taylor-Couette geometry has been performed at Re=5000. The drag reduction is determined by analyzing the decrease in global torque on the system at different values of the Weber number in order to study the effect of bubble deformability on drag reduction.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:31 mathematics, 33 physics
Programme:Applied Mathematics MSc (60348)
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