Abstract
The onset and development of convective flows during nonstationary conductive heating of a cell with a layer of cylindrical pebbles placed in a liquid medium have been studied using a proposed and implemented optical method. The temperature fields have been measured using a holographic interferometry technique with immersion optical tomography elements, which is based upon the dependence of the index of refraction on the temperature and properties of a continuous medium. The mechanism of the pebble-bed influence on the time and character of microconvection formed near the cell wall heated from below has been studied for variable thermal properties of the liquid medium and pebbles in the granular layer and supplied heat flux. Data on the visualization of temperature fields and the development of convective flows in a pebble-bed reactor cell of complicated shape during nonstationary heating have been obtained for the first time.
This is a preview of subscription content, log in via an institution to check access.
We’re sorry, something doesn't seem to be working properly.
Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.
References
G. A. Filippov, R. G. Bogoyavlenskii, and A. A. Avdeev, Tyazh. Mashinostr., No. 1, 43 (2002).
B. G. Pokusaev and D. A. Nekrasov, High Temp. 46(3), 367 (2008).
R. Situ, M. Ishii, T. Hibiki, J. Y. Tu, G. H. Yeoh, and M. Mori, Int. J. Heat Mass Transfer 51(25–26), 6268 (2008).
V. E. Nakoryakov, B. G. Pokusaev, and I. R. Shreiber, Wave Propagation in Gas-Liquid Media (CRC Press, Boca Raton, 1993).
B. G. Pokusaev, D. A. Nekrasov, and E. A. Tairov, High Temp. 50(1), 84 (2012).
A. N. Pavlenko, A. S. Surtaev, V. P. Koverda, V. N. Skokov, A. V. Reshetnikov, and A. V. Vinogradov, J. Eng. Thermophys. 18(1), 20 (2009).
W. Hauf and U. Grigull, Optical Methods in Heat Transfer (Academic Press, New York, 1970; Mir, Moscow, 1973).
V. A. Babenko, V. B. Konstantinov, and A. F. Malyi, Tech. Phys. Lett. 33(5), 410 (2007).
B. G. Pokusaev, S. P. Karlov, and I. R. Shreiber, Theor. Found. Chem. Eng. 38(1), 1 (2004).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © B.G. Pokusaev, S.P. Karlov, D.A. Nekrasov, N.S. Zakharov, 2014, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 40, No. 16, pp. 8–14.
Rights and permissions
About this article
Cite this article
Pokusaev, B.G., Karlov, S.P., Nekrasov, D.A. et al. Onset of convective flows in a near-wall granular layer during nonstationary liquid boiling. Tech. Phys. Lett. 40, 680–683 (2014). https://doi.org/10.1134/S1063785014080240
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063785014080240