Active control of Marangoni instability in a fluid layer with temperature-dependent viscosity in a microgravity environment

Ishak Hashim, S. Awang Kechil

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Linear active control of proportional feedback is applied to suppress the Marangoni convection in a heated layer of variable-viscosity fluid under microgravity conditions. The analytical solutions for the stationary and oscillatory modes are presented. The effects of the viscosity parameter, controller gain, Prandtl number and Biot number on the linear stability thresholds are examined. It is demonstrated that small perturbations in the thermal boundary conditions through feedback control can delay the onset of steady instability. Large controller gains play a major role in the occurrence of overstability that leads to oscillatory convection.

Original languageEnglish
Article number045504
JournalFluid Dynamics Research
Volume41
Issue number4
DOIs
Publication statusPublished - 2009

Fingerprint

Microgravity
active control
microgravity
controllers
Viscosity
viscosity
Biot number
Marangoni convection
Controllers
Fluids
fluids
Prandtl number
feedback control
Feedback control
convection
Boundary conditions
occurrences
boundary conditions
Feedback
perturbation

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physics and Astronomy(all)
  • Mechanical Engineering

Cite this

Active control of Marangoni instability in a fluid layer with temperature-dependent viscosity in a microgravity environment. / Hashim, Ishak; Awang Kechil, S.

In: Fluid Dynamics Research, Vol. 41, No. 4, 045504, 2009.

Research output: Contribution to journalArticle

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