Numerical investigation of Hopf bifurcation corresponding to transition from steady to oscillatory state in a confined convective flow

Alexander Yu Gelfgat, Pinhas Z. Bar-Yoseph, Alexander L. Yarin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Onset of oscillatory instability of convection of low-Pradtl-number fluid in a laterally heated rectangular cavity is investigated numerically. Cavities with rigid isothermal vertical boundaries, rigid adiabatic lower boundary, and stressfree adiabatic upper boundary are considered. Critical Grashof numbers corresponding to transition from steady to oscillatory state of the flow are calculated for the aspect ratio veied from 1 to 10. The oscillatory instability is shown to be due to the Hopf bifurcation and is characterized by the frequency of oscillations and pattern of the dominant infinitely small perturbation. Weakly nonlinear analysis of the Hopf bifurcation is used for asymptotic approximations of slightly supercritical flows.

Original languageEnglish
Pages (from-to)369-374
Number of pages6
JournalAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume237
Publication statusPublished - 1996

ASJC Scopus subject areas

  • Engineering(all)

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