Determining efficient values for the thermophysical properties of bulk materials

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.164791

Keywords:

bulk material, discrete and continual model, effective thermophysical properties, material and granulometric composition

Abstract

A procedure has been devised for determining the effective thermophysical properties of bulk materials with different granulometric and material composition, based on the integration of discrete and continuous models of media. The problem on the mechanical-thermal state of a cylindrical layer of bulk material has been stated in order to determine its effective thermophysical properties. Based on the discrete-continuous perceptions of bulk media, an approach has been suggested and a procedure has been devised for solving the problem set. The algorithm for determining effective values of thermophysical properties of bulk materials has been constructed. Numerical implementation of the developed procedure was performed using free open source software (LIGGGHTS, ParaView). The proposed procedure makes it possible to determine effective values for the thermophysical properties of a bulk material (bulk density, effective thermal conductivity coefficient and the effective value for isobaric mass heat capacity) with arbitrary material and granulometric composition. In this case, there is a need for a minimum volume of complex and costly experimental studies with subsequent numerical simulation of the process of the mechanical-thermal state of the examined bulk material. In this case, the true physical properties can be acquired from reference books. Using an example of model material, its effective thermophysical properties have been defined for different granulometric composition and the verification of the developed procedure has been performed. It was established that data on the effective thermal conductivity calculation based on the devised procedure differ from data obtained based on the theoretical averaged dependences, within 0.8‒9.0 %. The reported results are useful for numerical analysis in the continual approximation of thermal modes of the processes and equipment where bulk materials are used

Author Biographies

Anton Karvatskii, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Chemical, Polymeric and Silicate Mechanical Engineering

Yevgen Panov, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Chemical, Polymeric and Silicate Mechanical Engineering

Gennadiy Vasylchenko, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056

PhD, Associate Professor

Department of Chemical, Polymeric and Silicate Mechanical Engineering

Victor Vytvytskyi, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056

Postgraduate Student

Department of Chemical, Polymeric and Silicate Mechanical Engineering

Kateryna Korolenko, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Peremohy ave., 37, Kyiv, Ukraine, 03056

Department of Chemical, Polymeric and Silicate Mechanical Engineering

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Published

2019-04-24

How to Cite

Karvatskii, A., Panov, Y., Vasylchenko, G., Vytvytskyi, V., & Korolenko, K. (2019). Determining efficient values for the thermophysical properties of bulk materials. Eastern-European Journal of Enterprise Technologies, 2(5 (98), 55–62. https://doi.org/10.15587/1729-4061.2019.164791

Issue

Vol. 2 No. 5 (98) (2019): Applied physics

Section

Applied physics

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Copyright (c) 2019 Anton Karvatskii, Yevgen Panov, Gennadiy Vasylchenko, Victor Vytvytskyi, Kateryna Korolenko

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