Mass conducting (diffusional) properties of capillary-porous colloidal materials have been studied experimentally in the process of their convective drying depending on the moisture content and temperature of the material using as an example maize grains of three varieties. The physical mechanisms that influence the dependence of the mass conductivity coefficient of such a material on its moisture content are considered. It is shown that provided there is invariance of the dependence of the local temperature of the material on its local moisture content, the mass conductivity coefficient of the material can be determined depending on the moisture content of the latter and on the drying agent temperature, which simplifies the calculation of the drying kinetics substantially.
Similar content being viewed by others
References
S. P. Rudobashta, Kinetic calculation of the process of convective drying of disperse materials, in: Proc. 4th Minsk Int. Forum "Heat and Mass Transfer MIF-2000," 22–26 May 2000, Vol. 9, Heat and Mass Transfer in Drying Processes, ITMO NAN Belarusi, Minsk (2000), pp. 41–48.
S. P. Rudobashta, Mathematical simulation of the process of convective drying of disperse materials, Izv. Ross. Akad. Nauk, Énerg., No. 4, 98–102 (2000).
A. V. Luikov, Theory of Drying [in Russian], 2nd edn., Énergiya, Moscow (1968).
N. V. Pavlyukevich, Introduction to the Theory of Heat and Mass Transfer in Porous Media [in Russian], ITMO NAN Belarusi, Minsk (2003).
P. V. Akulich (P. S. Kuts Ed.), Themohydrodynamic Processes in the Drying Technique [in Russian], ITMO NAN Belarusi, Minsk (2002).
É. N. Ochnev, S. P. Rudobashta, A. N. Planovskii, and V. M. Dmitriev, Zonal method of determining the dependence of the mass conductivity coefficient on concentration, Teor. Osn. Khim. Tekhnol., IX, No. 4, 491–495 (1975).
S. P. Rudobashta (A. N. Planovskii Ed.), Mass Transfer in Systems with a Solid Phase [in Russian], Khimiya, Moscow (1980).
S. P. Rudobashta, Polymeric materials drying, in: Proc. Int. Symp. on Manufacturing and Materials Processing, 27–31 August 1990, Vol. 1, Dubrovnik, Yugoslavia (1990), pр. 661–678.
S. P. Rudobashta and V. M. Dmitriev, Kinetics and apparatus-technological arrangement of convective drying of disperse polymer materials, J. Eng. Phys. Thermophys., 78, No. 3, 463–473 (2005).
V. M. Dmitriev, Kinetics, Apparatuses and Technique of the Process of Convective Drying of Granulated and Film Polymer Materials, Doctoral Dissertation (in Engineering), TGTU, Tambov (2003).
S. P. Rudobashta and É. M. Kartashov, Diffusion in Chemical and Technological Processes [in Russian], 2nd revised and supplemented edn., KolosS, Moscow (2010).
I. S. Zabavin, S. P. Rudobashta, and V. M. Dmitriev, Investigation of the diffusional properties of grain, Khran. Pererab. Sel′khozsyr., No. 8, 24–28 (2010).
S. P. Rudobashta, A. V. Moryakov, and V. M. Dmitriev, Mass conductivity of rape grain in drying, Khran. Pererab. Sel′khozsyr., No. 8, 42–46 (2012).
S. P. Rudobashta, G. A. Zueva, V. M. Dmitriev, and N. A. Zuev, Mass conductivity in drying colloidal capillary-porous materials, Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 57, Issue 1, 103–107 (2014).
S. P. Rudobashta and M. K. Kosheleva, Determination of mass transfer coefficients and mass conductivity from kinetics curves, Izv. Vyssh. Uchebn. Zaved., Tekhnol. Tekst. Prom., No. 6 (360), 175–180 (2015).
P. Salagnac, P. Glouannec, and D. Lecharpentier, Numerical modeling of heat and mass transfer in porous medium during combined hot air, infrared and microwaves drying, Int. J. Heat Mass Transf., 47, 4479–4489 (2004).
J. Bon and T. Kudra, Enthalpy-driven optimization of intermittent drying, Drying Technol., 25, Issue 4, 523– 532 (2007).
H. A. Vaquiro, G. Clemente, J. V. Garcia-Perez, A. Mulet, and J. Bonb, Enthalpy-driven optimization of intermittent drying of Mangifera indica L, Сhem. Eng. Res. Des., 87, 885–898 (2009).
F. Tariku, K. Kumaran, and P. Fazio, Transient model for coupled heat, air and moisture transfer through multilayered porous media, Int. J. Heat Mass Transf., 53, 3035–3044 (2010).
C. Kumar, M. U. H. Joardder, T. W. Farrell, G. J. Millar, and M. A. Karim, Mathematical model for intermittent microwave convective drying of food materials, Drying Тechnol., 34, No. 8, 962–973 (2016).
S. P. Rudobashta, G. A. Zueva, and E. M. Kartashov, Heat and mass transfer when drying a spherical particle in an oscillating electromagnetic field, Theor. Found. Chem. Eng., 50, Issue 5, 718–729 (2016).
A. N. Vasil′ev, D. A. Budnikov, N. N. Gracheva, and O. V. Severinov, Perfection of the Technology of Grain Drying in a Dense Bed with the Use of Electrical Technologies, Automatic Control Systems, and Modeling of the Process [in Russian], Nauchn. Tsentr "VIM," Moscow (2016).
O. Krischer, Die wissenschaftlichen Grundlagen der Trocknungstechnik, Springer-Verlag, Berlin–Göttingen–Heidelberg (1956).
V. V. Kafarov and I. N. Dorokhov, System Analysis of the Processes of Chemical Technology. Foundations of the Strategy [in Russian], Nauka, Moscow (1976).
A. N. Planovsky, S. P. Rudobashta, and W. Kast, Kinetik der Erwärmung feuchter Stoffe bei konvektiver Trocknung, Chem.-Ing.-Tech., 48, Jahrgang, Heft 9, S. 803 (1976).
V. A. Rezchikov, O. N. Naleev, and S. V. Savchenko (V. A. Rezchikov Ed.), Grain Drying Technology [in Russian], Almatinsk. Tekhnol. Univ., Altmaty (2000).
S. P. Rudobashta, E. A. Muravleva, and G. A. Zueva, Equilibrium moisture content of maize grains, Nauka Tsentr. Rossii, No. 6 (30), 69–78 (2017).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 91, No. 4, pp. 903–911, July–August, 2018.
Rights and permissions
About this article
Cite this article
Rudobashta, S.P., Zueva, G.A., Muravleva, E.A. et al. Mass Conductivity of Capillary-Porous Colloidal Materials Subjected to Convective Drying. J Eng Phys Thermophy 91, 845–853 (2018). https://doi.org/10.1007/s10891-018-1808-x
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10891-018-1808-x