Transport and mixing problems in non-turbulent flows have been studied with chaotic advection theory to understand and quantify the characteristics of the fluid particle dynamics in simple analytical flows, and new analyses have been recently extended to realistic and more complex, experimentally realizable flows. Many environmental and engineering flows have also two or more phases, but little...

A reliable description of dense gas–solid two-phase flows of Geldart A particles in gasfluidized beds at life-size scale is of great practical importance in process industries. The classical two-fluid model, based on the kinetic theory of granular flows (KTGF), provides a very promising theoretical framework for predicting large-scale gas–solid twophase flows. However, thus far the two fluid mo...

suitable parametrization to simulate slug flows with the Volume-Of-Fluid method. OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. a b s t r a c t Keywords: Computational fluid mechanics Taylor flow Slug flow CFD Thin film VOF method Diffuse–interface methods, such as the Volume-Of-Fluid method, are often...

There are a number of systems in which supercritical cryogenic fluids are used as coolants or propellant fluids. In some modern military aircraft, the fuel is pressurized above its critical point and used as a coolant to remove heat from the aircraft engine. Accurate prediction of heat transfer coefficients to turbulent flows of supercritical fluids is essential in design of such systems. One o...

A granular material is a collection of a large number of discrete solid particles. Generally, the interstices between the particles are filled with a fluid such as air or water, and thus, technically, a granular flow is a multiphase process. However, if the particles are closely packed or if they are much denser than the interstitial fluid, the particles alone--and not the fluid or the fluid-pa...