Cylindrical particle modelling in pulverized coal and biomass co-firing process

Review on CFD based models for co-firing coal and biomass

“…In these figures, cases 1 and 2 correspond to approaches 1 and 3. Good agreement between measurements and simulation results using approach 3 were also obtained by [13] in a vertical cylindrical laboratory furnace where pulverized coal and biomass were co-fired. In this study, the ratio of coal and biomass in the fuel was 80:20 by mass.…”

Shape and size transformations of biomass particles during combustion

“…The shape, size and density of the particle is important for fluid dynamic modeling as it can affect the trajectory and residence time of the fuel particle inside the boiler [20]. Large particle size implies ignition delay [21] and longer burnout time [3,7], and therefore higher amount of carbon in ash in a furnace.…”

“…They also concluded higher aspect ratio leads to faster ignition. Bonefacic et al [20] analyzed the influence of the geometry of particles in the combustion process. Their model revealed that particle geometry has a significant impact on the starting point and the rate of devolatilisation as well as the char burning.…”

Numerical simulation on movement behaviours of cylindrical particles in a circulating fluidized bed

“…For example, collisions among cylindrical particles, movement and orientation of cylindrical particles, turbulence intensity, and velocities of flow field cannot be measured by experiments . Therefore, research on the hydrodynamics of cylindrical particle flow has so far largely relied on theoretical and numerical approaches …”

“…[4] Therefore, research on the hydrodynamics of cylindrical particle flow has so far largely relied on theoretical and numerical approaches. [5] Since being originated by Cundall and Stack, [6] the discrete element method (DEM) has become an increasingly popular research method in particle systems. [7,8] Then DEM was firstly employed by Tsuji et al for the simulation of gas-sphere flow in a fluidized bed, [9] and since then DEM-CFD has become an important approach for gas-solid flow.…”