Initial propagation of a flame kernel in turbulent flow conditions.
Physics and modelling
Initial premixed flame propagation in turbulent flow conditions. The flame front is represented by the reaction surface, assuming infinitely fast chemistry.
The surface propagates normal to itself with the laminar flame speed and interacts with resolved turbulent vortices. No turbulence modelling is required as all scales of
interest are resolved by the mesh. Two test cases will be presented:
Flame kernel growth in isotropic homogenous turbulence.
Flame kernel growth in a compressing/expanding box of turbulence with the compression ratio of 8.
In both cases, the initial condition represents a fully developed isotropic turbulent flow with conditions similar to those in an internal combustion engine. The mesh consists of
of 64x64x64 control volumes, allowing resolution of a range of turbulence scales.
