Determination of the thermophysical characteristics of alternatively freezing and thawing dispersed media by the method of solving inverse problems of heat conduction |
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Authors: | A. R. Pavlov P. P. Permyakov A. V. Stepanov |
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Affiliation: | (1) Institute of Physicotechnical Problems of the North, Yakut Division of the Siberian Branch of the Academy of Sciences of the USSR, Yakutsk |
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Abstract: | The article explains an algorithm for determining the thermophysical characteristics of dispersed media with phase transitions based on the method of solving inverse problems of heat conduction.Notation r space coordinate - time - T temperature of the specimen - T0 initial temperature - ci, cw, csk specific heat of ice, water, and of the organic-mineral skeleton, respectively - cf, cm, f, m specific heat and thermal conductivity in the frozen and melted zones, respectively - c effective heat capacity - thermal conductivity - p density - 0, sb bound and strongly bound moisture, respectively - (T) amount of nonfrozen water - R radius of the cylinder - q() heat flux - I functional - u1(), U2() measured temperatures of the specimen at the points r = 0 and r = R, respectively, at the instant - 1, 2 degree of confidence of the supplementary information - final instant of time - a, b, k, s positive constants - L specific heat of melting - N number of grid nodes over space - n number of grid nodes over time - h grid step over space - grid step over time - solution of the conjugate system - s number of iterationTranslated from Inzhenerno-Fizicheskii Zhurnal, Vol. 39, No. 2, pp. 292–297, August, 1980. |
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