Abstract
This article presents a description of a novel method for the identification of a decrease in the temperature of a liquid medium transported by railroad tank cars. No exact analytical solution exists for this phenomenon; therefore, the authors of this article have prepared a mathematical expression for the cooling process of the transported fluid by applying a dimensional analysis, which facilitated the identification of the dimensionless criteria using the relevant dimensional parameters. A functional dependence between the criteria can be identified through a physical or numerical experiment. In this case, a database of the results from a detailed numerical model was used; however, its disadvantage is that the calculation takes much longer than in a simpler similarity model. The output of the similarity model was a function of the average temperature of the fluid at a time applicable to various alternatives in the geometrical, physical, and boundary conditions. The standard deviation of the difference between the temperatures predicted by the similarity model and those calculated by the numerical simulation Tmod − Tsim represented 4.8% relative to the simulated fluid temperature.
Highlights
The cooling process of fluids during their transport or storage in tanks represents a complex issue in terms of both thermomechanics and fluid mechanics
No analytical solutions are available for such a complex process
A solution is proposed using a criterion equation. Such an equation may be derived from the relevant parameters through a dimensional analysis
Summary
Tomáš Brestovič 1 , Mária Čarnogurská 1 , Miroslav Příhoda 2 , Marián Lázár 1, * , René Pyszko 2 and Natália Jasminská 1. Scientific Conference—The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy 2020 (AEaNMiFMaE-2020), Piešt’any, Slovakia, 7–9 October 2020
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