Modeling of Drying

Planinic, M, Velic, D., Tomas, S., Bilk, M and Bucic, A., Modelling of drying and rehydration of carrots using Peleg s model, Eur. Food Res. Tech., 221 (2005) 446-451. 

D. Levi-Hevroni, A. Levy, I. Borde, Mathematical modelling of drying of liquid/solid slurries in steady sate one-dimensional flow, Drying Technol. 13 (5-7) (1995) 1187-1201. 

Microwave Heat Treatment of Textiles and a Review on Mathematical Model of Drying... 

Dry eye can result from a single phenomenon or as a secondary event associated with different types of antoimmnne diseases. The antoimmnne disease that is most closely associated with dry eye is Sjogren s syndrome, with the phenotype of the disease including CD4-i-T-cell infiltration into the lacrimal and submandibular glands. The MRL/lpr mouse, which contains a defective Fas receptor, has severe CD4-I- T-cell infiltration into the lacrimal gland. Female mice of this strain have more severe lacrimal gland cellular infiltration as compared with male mice. Animal models of dry eye that induce inflammation in the lacrimal functional unit in pathologic ways similar to that seen in humans provide a platform to evaluate the mechanisms of dry eye disease. 

ABSTRACT Internal temperature distribution and mass were measured during drying and pyrolysis of cylindrical samples of wood of 0, 14 and 44% moisture. A onedimensional model of drying and pyrolysis is modified to reflect the anisotropy of the wood. Inclusion of an instant axial convective mass flow is shown to reduce the time of conversion compared to simulations with no axial flow. This mass flow, contrary to a convective mass flow through a porous structure, is not in thermal equilibrium with the solid phase. The gas leaves at a lower temperature compared to the temperature of the solid phase and is thus neglected in the energy equation. 

Bennett, M. (1988). A Simple Physical Model of Dry Deposition to a Rough Surface. Atmos. Environ. 22(12), 2701-2705. 

Of course, one-dimensional EDMs are not without their drawbacks. Indeed, they suffer from several of the same problems that plague empirical and onedimensional LDMs. In particular, their use of empirical mouth-throat deposition models is a serious drawback to modeling of dry powder and metered-dose inhalers, as discussed earlier with purely empirical models. As with onedimensional LDMs, the use of simplified lung geometries and empirical... 

Waananen et al. (1993) have provided an extensive bibliography of over 200 references dealing with models of drying for porous solids. Basically, such models are useful to describe... 

Perre, P. Fohr, J.-P. Amaud, G. A model of drying applied to softwoods The effect of gaseous pressure below the boiling point. In Drying 89 Mujumdar, A S., Roques, M.A., Eds. Hemisphere New York, 1990 91-98. 

To obtain field data to test and improve models of dry deposition of particles, improved techniques and/or new instrumentation appear to be critical (Nicholson, 1988). Particle-size-specific, eddy-flux measurements (see Section 19.5) of ambient particles appear promising (e.g., Neumann and den Hartog, 1985) but to date have suffered from poor statistics associated with few particles in specific size classes. Furthermore, similar studies at... 

Dabral M. 1999. Solidification of Coatings Theory and Modeling of Drying, Curing and Microstructure Growth. [LEE, LES]... 

Fig. 4.22 Resistance model of dry deposition, — aerodynamic resistance, r — quasi-lami-nar resistance, — soil resistance, - soil resistance (water), - soil resistance (other ground), r f - fohar resistance (weighted by leaf area index), r s — stomatal resistance, r c cuticular resistance, mesophyhc resistance.

FIGURE 3.14 Solution of a model of drying for a shrinking solid. Gelatin plate 3 mm thick, initial moisture content 6.55 kg/kg. Shrinkage coefficient 5 = 1.36. Main plot shows dimensionless moisture content O, dimensionless thickness 5 = R/Rq, solid temperature t. Insert shows evolution of the internal profiles of O. 

Prat, M., 2D Modeling of drying of porous media Influence of edge effects at the interface. Drying TechnoL, 9(5) 1181-1208, 1991. 

REA approaches can be found in [14,20]. On the other hand, application of the REA approach in combination with deterministic modeling of drying kinetics is undoubtedly a potentially promising way of modeling, owing to its simplicity, versatility, and high accuracy at different drying conditions. 

Silva and Nerba [39] also used the two-fluid approach and presented a mathematical model of drying in cyclone. Slip condition of particles on the wall, particles-wall heat transfer, and particles shrinkage were considered. The mathematical model considered a steady state, incompressible, two-dimensional, axisymmetric, turbulent gas-solids flow. The gravity force effect on the particles was neglected. The particles assumed to be spherical and distributed in a layer of uniform concentration... 

Provided that a batch drying curve X t) is available, the performance of a continuously well-mixed fluidized bed dryer can be predicted, at least in principle, by a so-called integral model of drying first proposed by Vanecek et al. (1964). The model is based on the following equation for calculating the average outlet moisture content, Xq, from a continuous dryer ... 

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