ncku-talk2012-03-16

NCTS(South)/ NCKU Math Colloquium

DATE 2012-03-16　16:10-17:00

PLACE R204, 2F, NCTS, NCKU

SPEAKER Mr. Yu-Yu Liu (劉育佑先生)（University of California, Irvine, USA）

TITLE Turbulent Flame Speeds of G-equations in Cellular Flows

ABSTRACT Turbulent combustion is a complex nonlinear phenomenon. To analyze and compute the flame propagation speed is a fundamental issue in combustion theory. By level set formulation, G-equation describes the motion of the flame front by a laminar speed and a velocity field. We aim to study turbulent flame speeds modeled by G-equations and cellular flows, in particular their dependence on the intensity of the advection. Various approaches will be introduced, including homogenization theory, control theory and numerical computation. Due to flame stretching, curvature and strain rate may be added into the laminar speed. In strong advection regime, we wonder if these nonlinear effects cause front speed bending or flame quenching.

NCTS(South)/ NCKU Math Colloquium

DATE	2012-03-16　16:10-17:00

PLACE	R204, 2F, NCTS, NCKU

SPEAKER	Mr. Yu-Yu Liu (劉育佑先生)（University of California, Irvine, USA）

TITLE	Turbulent Flame Speeds of G-equations in Cellular Flows

ABSTRACT	Turbulent combustion is a complex nonlinear phenomenon. To analyze and compute the flame propagation speed is a fundamental issue in combustion theory. By level set formulation, G-equation describes the motion of the flame front by a laminar speed and a velocity field. We aim to study turbulent flame speeds modeled by G-equations and cellular flows, in particular their dependence on the intensity of the advection. Various approaches will be introduced, including homogenization theory, control theory and numerical computation. Due to flame stretching, curvature and strain rate may be added into the laminar speed. In strong advection regime, we wonder if these nonlinear effects cause front speed bending or flame quenching.