Effects of controller and cubic temperature profile on onset of Bénard-Marangoni convection in ferrofluid

R. Idris, Ishak Hashim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This study investigated the instability of Bénard-Marangoni convection in a horizontal layer of ferrofluid under the influence of a linear feedback control and cubic temperature profile. A linear stability analysis was performed. A single-term Galerkin technique was used to obtain the critical Marangoni number and critical Rayleigh number. The possibility of delaying the onset of convection by the application of linear feedback control is demonstrated.

Original languageEnglish
Pages (from-to)624-628
Number of pages5
JournalInternational Communications in Heat and Mass Transfer
Volume37
Issue number6
DOIs
Publication statusPublished - Jul 2010

Fingerprint

Marangoni convection
Magnetic fluids
ferrofluids
feedback control
temperature profiles
Feedback control
controllers
Linear stability analysis
Controllers
Rayleigh number
convection
Temperature
Convection

Keywords

  • Bénard-Marangoni ferroconvection
  • Cubic thermal gradient
  • Feedback control
  • Instability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

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AU - Hashim, Ishak

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AB - This study investigated the instability of Bénard-Marangoni convection in a horizontal layer of ferrofluid under the influence of a linear feedback control and cubic temperature profile. A linear stability analysis was performed. A single-term Galerkin technique was used to obtain the critical Marangoni number and critical Rayleigh number. The possibility of delaying the onset of convection by the application of linear feedback control is demonstrated.

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KW - Feedback control

KW - Instability

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