Numerical modeling of nonisothermal moisture transfer in biological colloidal porous materials

The authors derive and substantiate a system of equations of heat and moisture transfer in colloidal capillary-porous undersaturated media with account for the mutual effect of the vapor and liquid pressure, determined by the contribution of surface forces, and the temperature on the rate of interphase mass transfer and the thermocapillary flows. Examples are given of the numerical calculation of evolution of the moisture content and temperature fields and the kinetic dependences in a wide moisture content range for materials of biological origin, namely, yeast, soil. A comparison is made with experimental data.The work was carried out in 1992/93 on the basis of grant No. 1392/3-91, sponsored by the Science Committee of Poland.Academic Scientific Complex A. V. Luikov Heat and Mass Transfer Institute, Academy of Sciences of Belarus, Minsk, Belarus. Technical University of Lodz', Poland. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 66, No. 2, pp. 202–212, February, 1994.     

Relative diffusion resistance in drying wheat

An apparatus is described for examining various methods of convective drying.Notation tan=N_I drying rate in the first period - tan =(dW^c/d)_II drying rate in the second period - drying time - W _e ^c equilibrium water content - W^c water content of grain on dry mass - N^*=(1/N_I)(dW^c/d) dimensionless drying rate - T_sur surface temperature - T_a ambient temperature - T_w wet-bulb temperature - A,, experimental coefficients Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 31, No. 5, pp. 839–843, November, 1976.     

Development of a Conductive Filament for 3D Printing

Russian Engineering Research - The prospects for developing a new conductive filament that may be used in 3D printing are discussed. The filament is produced from metal powder with the addition of...     

Investigation of a pulsating-combustion chamber

The results of experimental investigations of a tangential chamber of pulsating combustion with an aerodynamic valve are discussed. The composition of combustion products, the level of sound pressure, and the temperature field are analyzed. Deceased. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 73, No. 3, pp. 493–496, May–June, 2000.     

Numerical investigation of evaporation of nonlinear multicomponent volatile solutions from a capillary

A mathematical experiment is conducted on the mechanism of evaporation of a ternary volatile solution from a cylindrical capillary.Translated from Inzhenerno-fizicheskii' Zhurnal, Vol. 61, No. 4, pp. 626–630, October, 1991.     

Some features of heat and moisture transfer and approximate methods of calculating the drying kinetics of moist materials

Approximate methods of calculating the drying kinetics of moist materials, derived from an analysis of experimental data, are discussed.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 32, No. 6, pp. 1007–1014, June, 1977.     

A Generalized equation for the temperature curve of the process of convective drying of moist materials

We present the derivation and analysis of the generalized equation for the temperature curve describing the process of drying in continuously operating convective drying installations with a nozzle-directed stream. The results from the numerical solution are compared against experimental data.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 57, No. 4, pp. 627–631, October, 1989.