Inflow conditions in stochastic Eulerian-Lagrangian calculations of two-phase turbulent flow

The importance of the inlet conditions of the dispersed-phase fluctuating v elocity on the analysis associated with the stochastic Lagrangian method, w hich is commonly used in the simulation of two-phase turbulent flows, is de monstrated through two well-defined problems. One is under the inlet condit ion of the carrier-phase turbulent kinetic energy k(g) larger than the disp ersed-phase turbulent kinetic energy kp. The other is associated with k(g) < k(p). A solution procedure accounting for the inlet conditions of the flu ctuating dispersed-phase velocities in the stochastic Lagrangian calculatio n is developed. It is also concluded that the unsteady drag coefficient has to be considered in the model formulation when the condition of the Stokes number larger than O(10(1)) is encountered in the examined two-phase turbu lent flowfield.