Calculation of a Confined Axisymmetric Laminar Diffusion Flame Using a Local Grid Refinement Technique

Abstract

In this paper a laminar diffusion flame is predicted using a local grid refinement technique and non-staggered meshes. A single coarse grid covers the whole domain and local grid refinement is carried out in the regions of high gradients without changing the basic grid structure. The Navier-Stokes, the energy and the chemical species transport equations are solved and a finite rate chemical kinetics combustion model is employed. Transport equations for the species concentration are solved using a pseudo time splitting technique. The predictions are in good agreement with the experimental measurements for a confined laminar methane flame. The numerical method proved to be robust and accurate.

Key Words:

• Local Grid Refinement
• Embedded grids
• Laminar Diffusion Flame
• Operator-Splitting
• Finite Rate Combustion Model