Hossain Chizari's Personal Web Page

CFD Method Developer and Programmer

DEM with DNS

A numerical study of 3D cylindrical fluidized bed by means of combined computational fluid dynamics (CFD) and discrete element method (DEM) was carried out. For particles motion Newton's second law and for the flow field 3D compressible Navier-Stokes equations in generalized curvilinear coordinates in conservative form were used. The Navier-Stokes equations were solved with high order compact finite difference scheme by fully implicit flux decomposition method. Furthermore Non-Reflecting Boundary Conditions (NRBC) was used for outflow boundary.

In the numerical study of this work, a cylindrical fluidized bed with 7.5 cm diameter and 50 cm height, filled with 10000 particles. The diameter and density of particles were 2mm and 1100 kg/m3, respectively. A jet of gas was introduced into the bed via a central hole with jet velocity of 8 m/s (u = 5umf).