Marangoni instability in a viscoelastic binary film with cross-diffusive effect

Marangoni convection in binary mixtures with Soret effect

The Onset of Double Diffusive Convection in a Binary Viscoelastic Fluid Saturated Porous Layer with Soret Effect

The onset of double diffusive convection in a binary viscoelastic fluid saturated porous layer, which is heated and salted from below in the presence of Soret effect is studied using both linear and nonlinear stability analyses. The linear theory is being related to the normal mode method. The modified Darcy law for the viscoelastic fluid of the Oldroyd type is used to model the momentum equati...

A mechanism for oscillatory instability in viscoelastic cross - slot flow

Interior stagnation point flows of viscoelastic liquids arise in a wide variety of applications including extensional viscometry, polymer processing and microfluidics. Experimentally, these flows have long been known to exhibit instabilities, but the mechanisms underlying them have not previously been elucidated. We computationally demonstrate the existence of a supercritical oscillatory instab...

Marangoni instability of a thin liquid film resting on a locally heated horizontal wall.

Long-wave Marangoni instabilities can be induced thermally on a thin liquid layer overlying a horizontal solid substrate with either a uniform or a nonuniform base temperature. For a nonuniform base temperature, the film height thickens near the region where temperature gradients are negligible and severely thins upstream; "fingering" patterns are observed in this region. These states are relat...

Double-Diffusive Natural Convection with Marangoni and Cooling Effects

Double-diffusive natural convection in an open top square cavity and heated from the side is studied numerically. Constant temperatures and concentration are imposed along the right and left walls while the heat balance at the surface is assumed to obey Newton’s law of cooling. The finite difference method is used to solve the dimensionless governing equations. The numerical results are reporte...