Technical Paper
Direct Numerical Simulation of Fuel Droplet Collision in Diesel Engines
2005-09-11
2005-24-056
Fuel droplet collision plays an important role in the mixture formation mechanism in Internal Combustion Engines (ICE), since this process significantly modifies the droplet sizes and subsequent spray development and combustion. But one of the major problems in the simulation of the droplet collision process is that the criteria employed to determine outcomes of collisions have not been assessed for accuracy under diesel spray conditions. The numerical simulation of multiphase flows is a challenging subject due to the difficulty in the tracking of interfaces, the mass conservation of each fluid and the treatment of large density ratio and surface tension. In this paper a fully 3D two-phase Lattice-Boltzmann Method (LBM) is used to perform Direct Numerical Simulation (DNS) of droplet collision at diesel-like conditions.