Turbulent flame speeds of G-equation models in unsteady cellular flows

Y. Y. Liu, J. Xin, Y. Yu

研究成果: Article同行評審


We perform a computationl study of front speeds of G-equation models in time dependent cellular flows. The G-equations arise in premixed turbulent combustion, and are Hamilton-Jacobi type level set partial differential equations (PDEs). The curvature-strain G-equations are also non-convex with degenerate diffusion. The computation is based on monotone finite difference discretization and weighted essentially nonoscillatory (WENO) methods. We found that the large time front speeds lock into the frequency of time periodic cellular flows in curvature-strain G-equations similar to what occurs in the basic inviscid G-equation. However, such frequency locking phenomenon disappears in viscous G-equation, and in the inviscid G-equation if time periodic oscillation of the cellular flow is replaced by time stochastic oscillation.

頁(從 - 到)198-205
期刊Mathematical Modelling of Natural Phenomena
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 建模與模擬
  • 應用數學


深入研究「Turbulent flame speeds of G-equation models in unsteady cellular flows」主題。共同形成了獨特的指紋。