Direct Numerical Simulation and Modeling of the oxy-fuel Combustion
B3 project considers higher levels of details of particle structure and kinetics and the interactions of particle combustion and turbulence. Here, particle-resolved simulations of particle arrays will be performed considering the porosity of the particles, which is known to be important. Subsequently, these effects will be incorporated in the point particle model. Then, 3-D particle-resolved simulations will be performed of particles in a turbulent flow field to study interactions between kinetics and turbulence. Furthermore, Direct Numerical Simulations (DNS) of devolatilization, char combustion, and the combined effects in a turbulent planar jet will be performed to study turbulence/chemistry interactions with a large number of fuel particles under oxy-conditions. This configuration is well suited for DNS and can provide good statistics for a larger number of parameter variations. Solid fuel combustion will also be studied in very few simulations of a swirl-stabilized configuration to assess the impact of the different flame stabilization on combustion model requirements. Analysis of the simulation results based on the optimal estimator concept will provide information about the interactions of particle combustion, particle dynamics, and molecular and turbulent mixing processes.