This review highlights the profound and unexpected ways in which viscosity varying in
space and time can affect flow. The most striking manifestations are through alterations of …

Stability of two superposed fluids of different viscosity in plane Poiseuille flow is studied
numerically. Conditions for the growth of an interfacial wave are identified. The analysis …

Two-fluid dynamics is a challenging subject rich in physics and prac tical applications. Many
of the most interesting problems are tied to the loss of stability which is realized in …

The two-phase mixing layer formed between parallel gas and liquid streams is an important
fundamental problem in turbulent multiphase flows. The problem is relevant to many …

There is extensive literature on the stability of parallel two-phase flow, both in the context of
liquid-liquid as well as gas-liquid flow. Aimed at making this literature more transparent, this …

The stability of core-annular flow (CAF) in pipes is analysed using the linear theory of
stability. Attention is confined to the potentially stable case of lubricated pipelining with the …

In this paper, we study the linearized stability of three symmetric arrangements of two liquids
in core–annular Poiseuille flow in round pipes. Deferring to one important application, we …

In this paper the weakly nonlinear stability of two‐phase core‐annular film flows in the limit
of small film thickness and in the presence of both viscosity stratification and interfacial …

A unified view is given of the instabilities that may develop in two-layer Couette flows, as a
'phase diagram'in the parameter space. This view is obtained from a preliminary study of the …

Consider the Couette flow of two superposed fluids of different viscosity with the depth of the
lower fluid bounded by a wall and the interface while the depth of the upper fluid is …