Flame Particle Tracking on a Turbulent Flame Front

Prof. Swetaprovo Chaudhury’s lab in Aerospace Engineering department of IISc conducts research in turbulent reacting flow physics. The group used 1.8 million core hours of the SERC’s Cray XC40 system in 2017. The projects made use of a finite difference open source code, called the pencil code, which is parallelized using MPI. A number of projects were carried out during the past year in the Turbulent Reacting Flow Physics using SERC’s HPC systems. Turbulent reacting flows were studied with the help of Direct Numerical Simulations (DNS).

A new method called on-the-fly flame particle tracking for tracking tracer particles on a turbulent flame front, solving their evolution within the DNS solver, was developed and used for studying the mechanics of flame annihilation (by analyzing the clusters formed by the particles). This technique can be applied in DNS simulations to study turbulent reacting flows from a Lagrangian viewpoint, without excessive requirements for data storage.

Flame particle tracking was used for various studies such as the evolution of individual points and surface elements in turbulent premixed flames. The understanding of flame speed is important in developing models that have practical applications in understanding phenomena such as flashback in a combustor.

The lab also performed a comparative study on the auto-ignition characteristics of a laminar hydrogennitrogen (H2 – N2) jet issued into a co-flow of heated air, and wake of heated air. The work analyzed the relative roles of radical species in the initiation of auto-ignition process, and has applications in designing bluff body stabilized combustors.

Publications

1. Himanshu L. Dave, Abinesh Mohan, Swetaprovo Chaudhuri, “Genesis and Evolution of Premixed Flames in Turbulence”, presented at Asia-Pacific Conference on Combustion, held at the University of Sydney, Australia, 2017.

2. Abinesh Mohan, Himanshu L. Dave, Swetaprovo Chaudhuri, “Evolution of Surface Elements in Premixed Flames in Turbulence”, presented at Asia-Pacific Conference on Combustion, held at the University of Sydney, Australia, 2017.

3. Harshawardhan Uranakara, “Flame-Particle Tracking: Analysis of Turbulence-Premixed Flame Interaction (Doctoral dissertation).” Submitted in 2017.

4. Abinesh Mohan, “Lagrangian Flame-Element Analysis of Turbulence-Premixed Flame Interactions (Masters thesis).” Submitted in 2017.