We examine the linear stability of fluid interfaces subjected to a shear flow. Our main object is to generalize previous work to arbitrary Atwood number, and to allow for surface tension and weak compressibility. The motivation derives from instances in astrophysical systems where mixing across material interfaces driven by shear flows may significantly affect the dynamical evolution of these s...

[1] We present three‐dimensional laboratory modeling of the evolution of finite strain and compare these to shear wave splitting observations in the Northwest U.S. under the High Lava Plains (HLP). We show that relationships between mantle flow and anisotropy are complicated in subduction zones and factors such as initial orientation of the olivine fast‐axis, style of subduction, and time evolv...

We examine the linear stability of the one dimensional inhomogeneous (shear banded) pressure-driven flow through a rectilinear microchannel predicted by the VCM model (Vasquez et al., A network scission model for wormlike micellar solutions I: model formulation and homogeneous flow predictions. J. Non-Newtonian Fluid Mech. 144:122-139, 2007). The VCM model is a microstructural network model tha...

We present here two extensions of the usual Bingham model in which we account for deformations in the region where the shear is below the threshold τo. In particular, we present two models that consider the material in the above region as a neo-Hookean solid or as a visco-elastic upper convected fluid. Both models are developed in the general 3-D framework of the natural configurations theory. ...

Microflow has become a popular field of interest due to the advent of microelectromechanical systems. In this work, the lattice Boltzmann method, a particle-based approach, is applied to simulate the two-dimensional isothermal pressure driven microchannel flow. Two boundary treatment schemes are incorporated to investigate their impacts to the entire flow field. We pay particular attention to t...

For the last three decades, the research into skimming flows down stepped chutes was driven by needs for better design guidelines. The skimming flow is characterised by some momentum transfer from the main stream to the recirculation zones in the shear layer developing downstream of each step edge. In the present study some physical modelling was conducted in a relatively large facility and det...

The behavior of colloidal gels under pressure-driven flow in square microchannels is quantified by microscopic particle image velocimetry (muPIV) and compared to predictions of available rheological models. The gels consist of hydrophobically modified silica microspheres (phi = 0.15-0.33) suspended in a refractive index-matched fluid along with fluorescent tracers to aid visualization. Measured...

To comprehensively understand the saturation of two-dimensional (2D) magnetized Kelvin–Helmholtz-instability-driven turbulence, energy transfer analysis is extended from traditional interaction between scales to include eigenmode interactions, by using nonlinear couplings linear eigenmodes ideal instability. While both kinetic and magnetic energies cascade small scales, a significant fraction t...

In the context of a nonequilibrium statistical thermodynamics, based on ensemble formalism, generalized hydrodynamics fluids under driven flow and shear stress is derived. At thermodynamic level, equations state are derived, which coupled to evolution basic variables that describe hydrodynamic motion in such system. Generalized diffusion-advection Maxwell-Cattaneo advection obtained appropriate...