Abstract
The dynamic response to an input pulse, of fixed beds packed with glass ballotini, has been measured over the range of particle Reynolds numbers from 1–300. The thermal conductivity of the particles, the particle to fluid heat transfer coefficient, and the coefficient of axial thermal dispersion have been found by Laplace transform analysis, Fourier transform analysis and by a numerical method, each applied to a minimum variance search. The three methods of estimation are described and compared. Agreement is found to be good over the entire range of Reynolds numbers although the sensitivity of the experiments to axial dispersion was greatest at low Reynolds numbers, while the sensitivity to fluid heat transfer coefficient and intra-particle conductivity was greatest at high Reynolds numbers.
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