Semi-explicit large eddy simulation in non-reacting air/gas fuel jet flows

A Semi-explicit Large Eddy Simulation (SeLES) is proposed to help handle interactions between discontinuities and turbulence when using conventional Sub-Grid Scale (SGS) models of large eddy simulation. For the grid-scale simulation, numerical viscosity becomes effective in limited region detected by discontinuity sensor, whereas a central difference scheme applied elsewhere. In our SeLES, discontinuous properties are considered SGS portion. Numerical tests demonstrated for compressible coaxial jet flows gas fuel air without reaction. comparison results experimental data confirms that this SeLES successfully prevents overlap viscosity.