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A diffuse-interface analysis of two-phase thermo-convective instabilities

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dc.contributor.advisor Venkatesan, Diwakar S.
dc.contributor.author Mishra, Saumyakanta
dc.date.accessioned 2023-08-18T11:27:30Z
dc.date.available 2023-08-18T11:27:30Z
dc.date.issued 2022-08
dc.identifier.citation Mishra, Saumyakanta. 2022, A diffuse-interface analysis of two-phase thermo-convective instabilities, MS thesis, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru en_US
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/handle/123456789/3345
dc.description Open access en_US
dc.description.abstract Two-phase flows are ubiquitous in natural and industrial settings. In the present work, we have developed a general ‘one-fluid’ diffuse-interface model suitable for various two-phase flow problems. The specific two-phase problem considered in the current work involves a binary fluid system, which poses a unique property of being miscible in each other depending on the system’s temperature and is completely miscible above a particular temperature, called the upper critical solution temperature (UCST). Accordingly, we have developed a spectral collocation-based phase field model to study the onset characteristics of Rayleigh-Bénard convection in a two-layer binary fluid system. We have also considered the Marangoni effect (variation of surface tension) in addition to the pure buoyancy-driven instability to examine how the strength of surface tension gradient can alter the onset behavior of the system. We have observed that the strength of the Marangoni effect can expand or contract the oscillatory onset window observed in the case of pure buoyancy-driven convection. The solubility of the system acts in unison with the interfacial tension term and comes with its own dual role in making the onset of convection either oscillatory or stationary en_US
dc.language.iso en en_US
dc.publisher Jawaharlal Nehru Centre for Advanced Scientific Research en_US
dc.rights JNCASR theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. en
dc.subject Thermo-convective en_US
dc.subject Fluid dynamics en_US
dc.subject Two-phase flow
dc.subject Thermodynamics
dc.title A diffuse-interface analysis of two-phase thermo-convective instabilities en_US
dc.type Thesis en_US
dc.type.qualificationlevel Master en_US
dc.type.qualificationname MS en_US
dc.publisher.department EMU en_US


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