Advertisement

Journal of engineering physics

, Volume 11, Issue 2, pp 119–123 | Cite as

Investigation of the mechanism of radiative-convective drying of colloidal capillary-porous materials using radioactive tracers

  • N. I. Gamayunov
  • V. I. Smirnov
Article
  • 18 Downloads

Abstract

Radioactive tracers have been used to study the process of layerwise drying of crumbled material. The dependence of evaporation zone penetration on the maximum drying rate has been established, and the phase composition of the transferred moisture has been determined.

Keywords

Evaporation Statistical Physic Phase Composition Radioactive Tracer Evaporation Zone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notation

u

moisture content, kg/kg

τ

drying time, hr

i

drying rate, kg/kg·hr

imaxis

maximum drying rate, kg/kg·hr

h

distance from surface of material dried, mm

N0

initial specific activity of material, counts/min

Ni

specific activity of material after passage of a certain drying time, counts/min

Pd

specific charge of material in terms of absolutely dry substance, kg//m2

q′

amount of moisture transferred from material dried to ground as a result of thermal moisture conduction, kg/m2·hr

Q

fraction of total amount of moisture transferred to ground in time τ, %

Subscripts

i andf

initial and final moisture content

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. V. Luikov, Heat and Mass Transfer in Drying Processes [in Russian], Gosenergoizdat, 1956.Google Scholar
  2. 2.
    A. V. Luikov and Yu. A. Mikhailov, Theory of Heat and Mass Transfer [in Russian], Gosenergoizdat, 1963.Google Scholar
  3. 3.
    M. P. Volarovich, N. I. Gamayunov, and N. V. Churaev, Kolloidnyi zhurn.,22, no. 5, 1960.Google Scholar
  4. 4.
    N. I. Gamayunov, IFZh, no. 4, 1960.Google Scholar
  5. 5.
    M. P. Volarovich, P. N. Davidovskii, and N. I. Gamayunov, Kolloidnyi zhurn.,27, no. 2, 1965.Google Scholar
  6. 6.
    N. V. Churaev, IFZh,5, no. 12, 1962;6, no. 2, 1963.Google Scholar
  7. 7.
    M. P. Volarovich, N. I. Gamayunov, A. P. Polyanicheva, and N. V. Churaev, Kolloidnyi zhurn.,27, no. 4, 1965; Torfyanaya promyshlennost, no. 3, 1965.Google Scholar
  8. 8.
    P. D. Lebedev, Infrared Drying [in Russian], Gosenergoizdat, 1955.Google Scholar
  9. 9.
    A. S. Ginzburg, Drying of Food Products [in Russian], Pishchepromizdat, 1960.Google Scholar
  10. 10.
    M. F. Kazanskii and P. P. Lutsik, IFZh,3, no. 11, 1960.Google Scholar
  11. 11.
    N. V. Churaev, DAN SSSR,148, no. 6, 1961.Google Scholar

Copyright information

© The Faraday Press, Inc. 1969

Authors and Affiliations

  • N. I. Gamayunov
    • 1
  • V. I. Smirnov
    • 1
  1. 1.Kalinin Polytechnic InstituteUSSR

Personalised recommendations