000			02017aab a2200193 4500
008			240130b19901990|||mr||| |||| 00| 0 eng d
022			_a0017-9310
100			_aAjay Mathur _9880495
245			_aA stochastic model for particle convective heat transfer in gas-solid fluidized beds
300			_a1929-1936 p.
520			_aParticle convection is the predominant mode of heat transfer in gas-solid fluidized beds of small particles at temperatures below 650 K and near-ambient pressures. The mechanism of heat transfer is unsteady-state conduction between the heat transfer surface and the hot bed particles which contact it in a recurrent, aperiodic manner. The particle-surface contacting is treated here as a stochastic process with the inter-packet periods being described by a constant-rate Poisson distribution and the contact periods by a negative exponential distribution. These features of the contacting process are incorporated into the packet heat transfer model of Baskakov, and expressions for the heat transfer coefficient and its variance are derived. The contact period distribution data of Ozkaynak and Chen for a bed of 245 μm glass beads at three fluidizing velocities is employed to predict the heat transfer coefficient and its variance at the three velocities. The predicted heat transfer coefficients are found to be in excellent agreement with the measured heat transfer coefficients. However, paucity of simultaneous contact-period distribution and heat transfer data has limited further verification of this model.
650			_aStochastic Model _9784248
650			_aParticle Convective Heat Transfer _9880496
650			_aGas-Solid Fluidized Beds _9880497
650			_aConstant-Rate Poisson Distribution _9880498
773	0		_tInternational Journal of Heat and Mass Transfer _x00179310 _dNew York, U.S.A : Pergamon Subsidiary of Elsevier Science & Technology
856			_uhttps://www.sciencedirect.com/science/article/pii/001793109090224I
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c814861 _d814861