Fluidization and drying of biomass particles in a vibrating fluidized bed with pulsed gas flow

(1997). Mathematical Modeling and Numerical Techniques in Drying Technology. Drying Technology: Vol. 15, No. 3-4, pp. 1259-1260.

Mathematical Modeling and Numerical Techniques in Drying Technology

A comprehensive survey of the literature in the area of numerical heat transfer (NHT) published between 2000 and 2009 has been conducted Due to the immenseness of the literature volume, the survey

Literature Survey of Numerical Heat Transfer (2000–2009): Part II

Abstract The effects of microwave heating patterns were investigated for the case of batch fluidized bed drying by solving numerically a coupled heat and mass transfer model. Three patterns, uniform, sinusoidal and rectangular waves, were examined with the average electric field strength kept constant at 1000 V / m . Properties of apple were used to represent porous materials. The results show that the magnitude and distribution of the moisture, temperature and pressure within a particle can be significantly affected. More importantly, the drying time and microwave energy consumption change with the pattern of how microwave heating is applied. Particularly, intermittent heating with a rectangular wave pattern has the most microwave energy consumption but the shortest drying time. For a particle size of 5 mm , airflow rate of 2 m / s and temperature of 60°C, the bed area factor fA of 100, the drying time is, respectively, 1600, 2000, 2400 s for rectangular, sinusoidal, and constant microwave heating. The values of microwave energy consumed for the three cases are, respectively, 2145, 1980, and 1560 kJ / kg water evaporated.

Theoretical Study of Microwave Heating Patterns on Batch Fluidized Bed Drying of Porous Material

Self-heating in a bioreactor: Coupling of heat and mass transfer with turbulent convection

A mathematical model is chosen and a finite-difference algorithm is developed to describe the drying of agro products in a batch fluidized bed. The mathematical model is discretized according to the implicit scheme for two particle geometries: sphere and chip. The system of algebraic equations is solved using the tridiagonal matrix algorithm (TDMA). Stability and convergence of the numerical algorithm are analyzed by variation of the time step and mesh size, finding computer time savings when using nonuniform space steps and boundary conditions are discretized using three nodal positions. Obtained results are compared with numerical results from the literature and experimental data of potato chips drying, concluding that the chosen model describes the phenomena correctly.

Computer Simulation of the Drying of Seeds and Vegetables in a Discontinuous Fluidized Bed

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Computer Simulation of the Drying of Seeds and Vegetables in a Discontinuous Fluidized Bed