TITLE:

ANALYSIS OF PARTICLE-LADEN, TURBULENT FLOW THROUGH EULERIAN-LAGRANGIAN SOLVERS AND VISUALIZATION.

DATE:

Friday, Jan 27th, 2012

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Gustaaf Jacobs.
Computational Science Research Center.
San Diego State University.

ABSTRACT:

The interaction between fluid flow and finite-sized inertial particles is of relevance to a wide range of technological applications and environmental flows such as liquid-fuel combustors, zoo plankton dispersion in ocean currents or resuspension of biochemical near-bed particles. Theoretical analysis of these phenomena that occur in a wide range of scales has proven to put heavy demands on computational and visualization models and methods. In this seminar, we first briefly summarize the development and validation of high-fidelity Eulerian-Lagrangian (EL) methods for the computation of turbulent flows laden with particles. We discuss some of the numerical and model challenges in these EL methods, where the gas flow is computed in the Eulerian frame through conservation laws while particles are traced in their Lagrangian frame. Secondly, we will present novel Lagrangian visualization and analysis methods. After a brief summary of recently developed theory of Lagrangian Coherent Structures (LCS), the role of LCS in the transport of particles in unsteady, separated flow over a backward-facing step, a rectangular cylinder and a diffuser geometry is presented.

HOST:

Dr. Jose Castillo.

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