A direct approach to generalised multiple mapping conditioning for selected turbulent diffusion flame cases

Abstract

This work presents a direct and transparent interpretation of two concepts for modelling turbulent combustion: generalised Multiple Mapping Conditioning (MMC) and sparse-Lagrangian Large Eddy Simulation (LES). The MMC approach is presented as a hybrid between the Probability Density Function (PDF) method and approaches based on conditioning (e.g. Conditional Moment Closure, flamelet, etc.). The sparse-Lagrangian approach, which allows for a dramatic reduction of computational cost, is viewed as an alternative interpretation of the Filtered Density Function (FDF) methods. This work presents simulations of several turbulent diffusion flame cases and discusses the universality of the localness parameter between these cases and the universality of sparse-Lagrangian FDF methods with MMC.

Keywords:

• multiple mapping conditioning
• probability density function
• large eddy simulation
• turbulent diffusion flames
• sparse methods

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is supported by the Australian Research Council [grants DP120102294 and DP130100763].