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Y. Alhendal, A. Turan, F. Alhenda, "Thermocapillary Droplet Flow in a Rotating Cylinder: A 3D study", in B.H.V. Topping, P. Iványi, (Editors), "Proceedings of the Eleventh International Conference on Engineering Computational Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 2, Paper 2.10, 2022, doi:10.4203/ccc.2.2.10

Keywords: droplet, two-phase, zero-gravity, thermocapillary, surface tension gradient, VOF-ANSYS.

Abstract

In this paper, a study is presented for Marangoni flow driven by a temperature gradient, causing a droplet to migrate from a cold to a hot region in an enclosure. Specifically, the detailed behaviour of a thermocapillary isolated droplet rising in an axisymmetric rotating cylinder in a zero-gravity environment is analyzed and numerically presented via a computational fluid dynamics (CFD) approach. The momentum and continuity equations for the multi-phase flow are solved using the commercial software package Ansys-Fluent v.13. The volume-fluid (VOF) method is used for two- phase flow tracking, a methodology that has been found to be a valuable computational tool for studying the Marangoni phenomenon regarding liquid-liquid interaction, and the validation of results are in reasonable agreement with previous experimental observations from the literature. Thermocapillary droplet flow was also implemented in a 3D geometry in a zero-gravity environment for rotational velocities ranging from 0.5 to 1 radian/sec. The study revealed that the behavior of the droplet varies significantly with the angular velocity as it heads towards the side wall with increase of the angular movement.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 2 PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: B.H.V. Topping and P. Iványi Paper 2.10 Thermocapillary Droplet Flow in a Rotating Cylinder: A 3D study Y. Alhendal¹, A. Turan² and F. Alhendal³ ¹College of Technological Studies (CTS), PAAET, Kuwait ²Independent Researcher, Consultant ³American University of the Middle East (AUM), Kuwait doi:10.4203/ccc.2.2.10 Full Bibliographic Reference for this paper Y. Alhendal, A. Turan, F. Alhenda, "Thermocapillary Droplet Flow in a Rotating Cylinder: A 3D study", in B.H.V. Topping, P. Iványi, (Editors), "Proceedings of the Eleventh International Conference on Engineering Computational Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 2, Paper 2.10, 2022, doi:10.4203/ccc.2.2.10 Keywords: droplet, two-phase, zero-gravity, thermocapillary, surface tension gradient, VOF-ANSYS. Abstract In this paper, a study is presented for Marangoni flow driven by a temperature gradient, causing a droplet to migrate from a cold to a hot region in an enclosure. Specifically, the detailed behaviour of a thermocapillary isolated droplet rising in an axisymmetric rotating cylinder in a zero-gravity environment is analyzed and numerically presented via a computational fluid dynamics (CFD) approach. The momentum and continuity equations for the multi-phase flow are solved using the commercial software package Ansys-Fluent v.13. The volume-fluid (VOF) method is used for two- phase flow tracking, a methodology that has been found to be a valuable computational tool for studying the Marangoni phenomenon regarding liquid-liquid interaction, and the validation of results are in reasonable agreement with previous experimental observations from the literature. Thermocapillary droplet flow was also implemented in a 3D geometry in a zero-gravity environment for rotational velocities ranging from 0.5 to 1 radian/sec. The study revealed that the behavior of the droplet varies significantly with the angular velocity as it heads towards the side wall with increase of the angular movement. download the full-text of this paper (PDF, 7 pages, 796 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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