TITLE:

SIMULATION OF MIXED CONTINUUM-DISCRETE PHYSICS WITH HIGH-ORDER METHODS (No. 121)

DATE:

Friday, September 8th, 2006

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Guus Jacobs, Department of Aerospace Engineering, San Diego State University

ABSTRACT:

In the last decade, high-order multidomain methods have established themselves as effective methods for long time integration of complex high-frequency wave-dominated continuum problems. They have for example shown to be superior for simulation of electromagnetic scattering on aircraft and simulation of turbulent flows in complex geometries. High-order methods secure their geometric flexibility by using fully unstructured grids, they can have arbitrary order of accuracy, and have excellent stability properties.

I will present the development of high-order multidomain methods for the simulation of problems in the continuum-discrete framework. In this framework the governing continuum equations are solved on a static grid, while individual particles are tracked using a Lagrangian formulation. The focus is to carry over the favorable aspects of the continuum high-order method to the continuum-discrete framework, i.e. to develop efficient, high-order space and time methods for moving particles, complex particle-boundary interactions, and for coupled discrete phase and continuum phases.

I will illustrate the benefits of the method through simulations of astrophysical and industrial plasma dynamics, where the electromagnetic continuum is described by the Maxwell�s equations and the discrete framework consists of electrons and ions. I will also present simulations of particle-laden flows with relevance to combustors, where the Navier-Stokes equations govern the fluid continuum, and liquid fuel droplets govern the discrete framework..

HOST:

Jose Castillo

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