Lagrangian numerical simulation of plug flow of cohesionless particles in a horizontal pipe

Numerical and experimental study of horizontal pneumatic transportation of spherical and low-aspect-ratio cylindrical particles

“…In one of the first attempts to apply DEM for numerical modelling of pneumatic conveying, Tsuji et al [16] applied 1D CFD and 3D DEM to model a horizontal pipe. The Ergun equation was used to calculate the fluid force acting on the particles.…”

“…Fraige and Langston [18] developed Tsuji's model [16] by correcting the pressure drop calculation in pneumatic conveying for 1D CFD and 3D DEM simulation. It was assumed that the fluid flow was at steady state for each time step.…”

Plug conveying in a horizontal tube

“…For the dense phase regime, simulations have been done for bubbling fluidized beds [42; 37; 15; 13; 8; 44], which show at high gas velocities the first signs of pneumatic transport [19; 40; 12], for the strand type of conveying [10; 35; 38; 43], and for slug conveying. The simulation results on slugs published by Tsuji et al [36], Tomita et al [34] and Levy [18] are discussed later in this paper.…”

Aerosol cluster impact and break-up : model and implementation.

“…Note the dissipative force does not appear in equations (1) or (5). The tangential frictional forces are represented similarly using a Mindlin-type model [15]. In practice this amounts to a spring and a dashpot model for both the normal and tangential contact forces with the addition of a slider in the tangential model due to the Coulomb friction limit.…”

“…Note we have again assumed equal sized spheres of identical materials. In the model of [5] following [15] the normal damping coefficient is written as…”