A computational investigation of dynamic stabilization of rayleigh-bénard convection under system acceleration

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The static and dynamic stability of Rayleigh-Bénard convection in a rectangular flow domain is computationally investigated. Sinusoidal vertical oscillations are applied to the system to provide dynamic flow stabilization. Stability maps are produced for a range of flow and heating conditions, and are compared to experimental measurements and linear stability analysis predictions from existing literature. Density variation is introduced through: 1) the Boussinesq approximation, 2) a linearly varying temperature dependent equation of state (EOS) and 3) the perfect gas EOS. Significant effects of choice of EOS on dynamic stability are observed. These weakly compressible flows are solved efficiently using an implicit numerical method that has been developed to solve the momentum, continuity, enthalpy and state equations simultaneously in fully coupled fashion. This block coupled system of equations is linearized with Newton's method, and quadratic convergence is achieved. The details of these numerics are presented.

Original languageEnglish (US)
Title of host publicationASME 2020 Heat Transfer Summer Conference, HT 2020, collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791883709
DOIs
StatePublished - 2020
EventASME 2020 Heat Transfer Summer Conference, HT 2020, collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels - Virtual, Online
Duration: Jul 13 2020Jul 15 2020

Publication series

NameASME 2020 Heat Transfer Summer Conference, HT 2020, collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels

Conference

ConferenceASME 2020 Heat Transfer Summer Conference, HT 2020, collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels
CityVirtual, Online
Period7/13/207/15/20

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics

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