A Pragmatic Approach of Computational Methods for Simulation of Multiphase Flows

Abstract

In this paper we study the numerical simulation of multiphase flows which is a powerful tool for investigating and understanding the multiphase flows and to provide insight on the physics of free surface and interfacial flows such as bubble droplet dynamics, ocean wave motion, among others. The advanced in computational fluid dynamics and its extension to multi-fluid flows which is computational multifluid dynamics (CMFD) together with the increasing capacity of parallel computers have made possible to tackle such complex problems by using high performance numerical techniques such as direct numerical simulation (DNS).  Direct numerical simulation is an important research area in modern CMFD. Moreover, DNS has a key role for improving the understanding of the multiphase phenomena and for using this technique for the simulation of flows in complex geometricians. The results from DNS is useful for developing better Eulerian-Eulerian and Eulerian-Lagrange methods. Furthermore, most of the DNS methods discussed in the literature have been restricted to Cartesian meshes and academic configurations. Thus the reasons are mainly due to the limited computational resources and because the standards algorithms are very complex to be efficient implemented on unstructured grids.

Keywords:Conservative level set method, Bubbly flow, Computational multi fluid dynamics, Navier Stoke’s equation, Direct numerical simulation.