Physical Features of Drying Process of Capillary Porous Materials in a Pulsing Gas Flow. Part 2. Features of Thermo- and Mass Transfer

Forestry and Wood Technology 2007
Valērijs Ušakovs, Viktors Gopeenko, Nataļja Sidenko, Olegs Gerdts

On the basis of the numerical calculations it is shows that flow, heat transfer and diffusive mass transfer characteristics of the single cylindrical particle in the pulsating gas stream depend on the vortex breakaway frequency and on the configuration of the vortex trail behind the particle. The dependence of the Nusselt criterion that characterizes the heat transfer in the dryer conditions on the dimensionless pulsation frequency of the external stream is studied. The hysteresis effect of the aerodynamic coefficients and the heat and mass transfer coefficients that is the consequence of the pulsating stream Reynolds number instantaneous change is found. The amplitude and the pulsating stream form as well as the Reynolds average number influence peculiarities on the intensity of the heat and mass transfer are analyzed.

Atslēgas vārdi
drying, pulsing gas flow, heat exchange, vortex, frequency, aerodynamic hysteresis

Ušakovs, V., Gopeenko, V., Sidenko, N., Gerdts, O. Physical Features of Drying Process of Capillary Porous Materials in a Pulsing Gas Flow. Part 2. Features of Thermo- and Mass Transfer. No: Forestry and Wood Technology . Warsaw: Annals of Warsaw Agricultural University – SGGW, 2007, 316.-320.lpp. ISSN 1898-5912.

Publikācijas valoda
English (en)