The derivation of thermal relaxation time between two-phase bubbly flow |
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Authors: | S A Mohammadein |
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Institution: | (1) Mathematics Department, Faculty of Science, Tanta University, Tanta, Egypt |
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Abstract: | Thermal relaxation time constant is derived analytically for the relaxed model with unequal phase-temperatures of a vapour
bubble at saturation temperature and a non-steady temperature field around the growing vapour bubble. The energy and state
equation are solved between two finite boundary conditions. Thermal relaxation time perform a good agreement with Mohammadein
(in Doctoral thesis, PAN, Gdansk, 1994) and Moby Dick experiment in terms of non-equilibrium homogeneous model (Bilicki et
al. in Proc R Soc Lond A428:379–397, 1990) for lower values of initial void fraction. Thermal relaxation is affected by Jacob
number, superheating, initial bubble radius and thermal diffusivity. |
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Keywords: | Average temperature of the superheated liquid Extended Scriven theory Thermal relaxation time Moby Dick experiment |
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