COMPARISON BETWEEN EULER-EULER AND EULER-LAGRANGE COMPUTATIONS OF GAS-SOLID TURBULENT FLOW IN A HORIZONTAL CHANNEL WITH DIFFERENT WALL ROUGHNESS

This paper presents practical eulerian rough wall boundary conditions for particle mean velocity and fluctuating components. The model derives from a pdf approach and the Sommerfeld particle-wall rebound theory [1]. We have implemented these boundary conditions in 2D Euler/Euler code "Melodif" by neglecting the "shadow effect" [2] and assuming an half-gaussian distribution for wall-normal incident particle velocities. Lagrangian calculations in which the particle-wall collisions are treated following Sommerfeld [1], are carried out. Low and high roughness cases are simulated and both simulations results are compared with Sommerfeld experimental database.