Non-modal stability analysis of stratified two-phase channel flows

Ilya Barmak, Alexander Yu. Gelfgat,Amos Ullmann,Neima Brauner

International Journal of Multiphase Flow（2019）

引用 10|浏览2

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摘要

•Transient energy growth of perturbations in stratified two-phase flow is studied.•The energy norm should account for the kinetic, interfacial and gravitational energy.•The maximal transient energy growth is attained mostly by spanwise perturbations.•Oblique optimal perturbations can yield noticeable interface deformation.•Non-modal growth may be a precursor to subcritical flow pattern transition.

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关键词

Two-phase stratified flow,Non-modal stability,Transient energy growth,Optimal perturbations,Gravity effect

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