Minimum Spouting Velocity in a Gas Solid Spouted Bed: Analytical
Approximation and Experimental Findings
Abstract
Calculating a minimum spouting velocity for a given solid-fluid system
has never been easy as the right choice of the correlation was
difficult. It is shown in the present work that an analytical
approximation for the exponent on the major influential parameters may
be helpful if the derivation results from the basic force balance
between solid and fluid. Nearly a dozen of earlier reported correlations
are compared here with their key experimental details. Systematic
experiments were performed using seven different spouted bed apparatus,
nine different solid particles and two different spouting gases. Results
from the analytical approximation, present experiments and the past
reported correlations, a comprehensive correlation is proposed covering
a wide range of variables. An industrial engineer or a scientist can now
judiciously choose suitable exponent on the major influential parameters
for a given set of spouted bed apparatus/ column, solid and fluid.