The effect of flow instabilities on capillary trapping mechanisms is a major source of uncertainty in CO2 sequestration in deep saline aquifers. Standard macroscopic models of multiphase flow in porous media are unable to explain and quantitatively predict the onset and structure of viscous-unstable flows, such as the displacement of brine by the injected CO2. We present the first step of a res...

In this paper we propose a multiphase model with nonequilibrated temperatures but with equal velocities and pressures for each species. Turbulent mixing is driven by diiusion in these equations. The closure equations are deened in part by reference to a more exact chunk mix model developed by the authors and coworkers which has separate pressures, temperatures, and velocities for each species. ...

It is well established that inlet flow characteristics may affect the performance of fluid handling systems considerably. This work focuses on the local flow analysis of a severe service control valve with a continuous resistance trim (CRT) operating under multiphase flow conditions and the effect of the inlet flow characteristics on the dispersed phase distribution within the trim and the valv...

multiphase impeller stirred tank reactors enhance mixing of reacting species used in a variety of chemical industries. these reactors have been studied based on computational fluid dynamics (cfd) that can be used in the analysis, design and scale up of these reactors. most of the researches done in this area are limited to single phase reactors, and a few remaining two phase flow investigations...

The role of direct numerical simulations (DNS) of multiphase flows, where all continuum length and time scales are fully resolved, in validation and verification of models for the average flow, is discussed. Although DNS are usually limited to relatively small problems and are generally impractical for predictions of full-scale multiphase systems, DNS offer unprecedented data and insight. Indee...

Design and Analysis of Multiphase DC-DC Converters with Coupled Inductors. (May 2007) Meng Shi, B.Eng., Shanghai Jiao Tong University, China Chair of Advisory Committee: Dr. Prasad Enjeti In this thesis, coupled inductors have been applied to multiphase DC-DC converters. Detailed analysis has been done to investigate the benefits of directly coupled inductors and inversely coupled inductors, co...