Chapter

IUTAM Symposium on Laminar-Turbulent Transition

Volume 78 of the series Fluid Mechanics and Its Applications pp 145-151

EFFECT OF VISCOSITY STRATIFICATION ON SECONDARY AND NONMODAL INSTABILITIES

  • A. SameenAffiliated withDepartment of Aerospace Engineering, Indian Institute of Science

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Abstract

The effect of viscosity stratification on the different mechanism of transition to turbulence is not well understood. In this paper, a viscosity variation normal to the flow in a channel is investigated. The primary and secondary instability are computed, and the transient growth is analysed. It is found that viscosity stratification can have different effects in each case.