TY - JOUR
T1 - Bubble formation at a central orifice in a gas-solid fluidized bed predicted by three-dimensional two-fluid model calculations
AU - Verma, V.K.
AU - Padding, J.T.
AU - Deen, N.G.
AU - Kuipers, J.A.M.
PY - 2014
Y1 - 2014
N2 - We apply a recently developed two-fluid continuum model (TFM) based on kinetic theory of granular flow (KTGF) in three dimensional cylindrical coordinates, to investigate bubble formation through a single central orifice in a gas–solid fluidized bed. A comprehensive study for Geldart D type particles, revealing the influence of particle diameter, jet injection flow rate, and bed size on bubble characteristics have been investigated. At a given gas injection flow rate, the bubble diameter continuously increases while gas leakage from the bubble to the emulsion phase decreases with time. With increasing particle diameter, leakage fraction increases and hence a smaller bubble diameter is predicted. These results are consistent with DPM simulations, experimental results and approximate bubble formation models reported previously in the literature.
AB - We apply a recently developed two-fluid continuum model (TFM) based on kinetic theory of granular flow (KTGF) in three dimensional cylindrical coordinates, to investigate bubble formation through a single central orifice in a gas–solid fluidized bed. A comprehensive study for Geldart D type particles, revealing the influence of particle diameter, jet injection flow rate, and bed size on bubble characteristics have been investigated. At a given gas injection flow rate, the bubble diameter continuously increases while gas leakage from the bubble to the emulsion phase decreases with time. With increasing particle diameter, leakage fraction increases and hence a smaller bubble diameter is predicted. These results are consistent with DPM simulations, experimental results and approximate bubble formation models reported previously in the literature.
U2 - 10.1016/j.cej.2014.02.026
DO - 10.1016/j.cej.2014.02.026
M3 - Article
SN - 1385-8947
VL - 245
SP - 217
EP - 227
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -