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Onset of Flow Instability in a Heated Capillary

Part of the Heat and Mass Transfer book series (HMT)

Abstract

The capillary flow with distinct evaporativemeniscus is described in the frame of the quasi-dimensional model. The effect of heat flux and capillary pressure oscillations on the stability of laminar flow at small and moderate Peclet number is estimated. It is shown that the stable stationary flow with fixed meniscus position occurs at low wall heat fluxes (Pe≪1), whereas at high wall heat fluxes Pe ≥ 1, the exponential increase of small disturbances takes place. The latter leads to the transition from stable stationary to an unstable regime of flow with oscillating meniscus.

Keywords

Heat Transfer Capillary Pressure Heat Mass Transfer Peclet Number Flow Instability 
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© Springer-Verlag Berlin Heidelberg 2009

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