Mathematical Model Based on DSMC Method for Particulate Drying in a Coaxial Impinging Stream Dryer

An impinging stream dryer (ISD) belongs to a unique class of dryers that has proved to be an excellent alternative to flash dryers for removing surface moisture of particulate materials due to the collision of streams and particles in the dryer. However, the performance analysis of such devices, from a viewpoint of mathematical modeling, has not been investigated extensively. In this study, a mathematical model based on the direct simulation Monte Carlo (DSMC) method is proposed to describe the drying process of particulate materials in a coaxial ISD. The collisions between particles and the heat exchange between impacting particles are included in the present mathematical model. The predicted results were in good agreement with the experimental data, which indicates the validity of the present model. The drying process and the effects of various parameters, including the feeding mode and impinging distance, on the drying performance of the dryer were then numerically investigated and discussed.

[1]  Simulation of Drying Characteristics of Evaporation from a Wet Particle in a Turbulent Pulsed Opposing Jet Contactor , 2013 .

[2]  Kittichote Supakumnerd,et al.  A review of the impinging stream dryer , 2013 .

[3]  A. Mujumdar,et al.  Some Recent Advances in Drying Technologies to Produce Particulate Solids , 2013 .

[4]  Du Mi.  Study of the Mechanism Governing the Intensified Heat and Mass Transfer in a Gas-solid Two-phase Impingement Flow , 2013 .

[5]  Numerical Simulation of Multiphase Transport Phenomena During Impinging Stream Drying of a Particulate Material , 2012 .

[6]  Z. Tao,et al.  Theoretical Model Study on Impact Heat Transfer Between Particles in Impinging Streams , 2012 .

[7]  Liping Liu.  THEORY OF ELASTICITY , 2012 .

[8]  Hongwei Guo,et al.  A modified DSMC method for simulating gas–particle two-phase impinging streams , 2011 .

[9]  R. Fox,et al.  Validation of LES predictions for turbulent flow in a Confined Impinging Jets Reactor , 2011 .

[10]  Z. Tao.  Experimental Study on Coaxial Gas-Solid Two Impinging Stream Drying , 2011 .

[11]  S. Devahastin,et al.  Evaluation of performance and energy consumption of an impinging stream dryer for paddy , 2010 .

[12]  A. Rahimi,et al.  MATHEMATICAL MODELING AND SIMULATION OF DRYING OF A SINGLE WET PARTICLE IN A COAXIAL IMPINGING STREAM DRYER , 2010 .

[13]  Liu Xiang-dong.  Application of DSMC method in large-scale gas-solid two-phase impinging streams , 2009 .

[14]  B. Lakatos,et al.  Population balance model of heat transfer in gas–solid particulate systems , 2008 .

[15]  Performance Evaluation of an Impinging Stream Dryer for Particulate Materials , 2007 .

[16]  Yuan Wu.  IMPINGING STREAM DRYING , 2007 .

[17]  Jianmin Ding,et al.  Numerical simulation of bubble and particles motions in a bubbling fluidized bed using direct simulation Monte-Carlo method , 2006 .

[18]  Xiangdong Ding,et al.  Drying Research and Development in China , 2004 .

[19]  J. Barbera,et al.  Contact mechanics , 1999 .

[20]  Y. Tsuji,et al.  Cluster patterns in circulating fluidized beds predicted by numerical simulation (discrete particle model versus two-fluid model) , 1998 .

[21]  A. Mujumdar,et al.  Superheated Steam Drying of a Single Particle in an Impinging Stream Dryer , 1995 .

[22]  Abraham Tamir,et al.  Impinging-Stream Reactors: Fundamentals and Applications , 1994 .

[23]  M. M. Chen,et al.  A theoretical analysis of heat transfer due to particle impact , 1988 .

[24]  Helmut Neunzert,et al.  On simulation methods for the Boltzmann equation , 1987 .

[25]  Arun S. Mujumdar,et al.  NUMERICAL HEAT TRANSFER: T.M. Shih Hemisphere. New York (1984) XVII+563 pp. , 1985 .