Direct numerical simulation of a high-pressure turbulent reacting temporal mixing layer

Direct numerical simulation of turbulent mixing.

The results of three-dimensional numerical simulations of turbulent flows obtained by various authors are reviewed. The paper considers the turbulent mixing (TM) process caused by the development of the main types of instabilities: those due to gravitation (with either a fixed or an alternating-sign acceleration), shift and shock waves. The problem of a buoyant jet is described as an example of...

Direct Numerical Simulation of Reacting Turbulent Multi-Species Channel Flow

Studies of turbulent boundary layer flow through direct numerical simulation

The objective has been to study turbulent boundary layers under adverse pressure gradients (APG) through direct numerical simulation (DNS). The numerical code is based on a pseudo-spectral technique which is suitable for the simple geometry (flat plate) considered here. A large effort has been put into the optimization of the numerical code on various super computers. Five large simulations hav...

Direct numerical simulation of turbulent mixing of a passive scalar in pipe flow

Turbulent mixing of a passive scalar in fully developed turbulent pipe flow has been investigated by means of a Direct Numerical Simulation (DNS). The scalar is released from a point source located on the centreline of the pipe. The domain size of the concentration field has been chosen large enough to capture the different stages of turbulent mixing. Results are presented for mean concentratio...

Investigation of Turbulent Entrainment-Mixing Processes with a New Particle-Resolved Direct Numerical Simulation Model

13 A new particle-resolved three dimensional direct numerical simulation (DNS) model is 14 developed that combines Lagrangian droplet tracking with the Eulerian field representa15 tion of turbulence near the Kolmogorov microscale. Six numerical experiments are per16 formed to investigate the processes of entrainment of clear air and subsequent mixing with 17 cloudy air and their interactions wi...