THERMAL SCIENCE

International Scientific Journal

Xiaoyan Liu

,

Zheng Zhou

,

Cong Li

,

Haiqian Zhao

,

Ying Xu

,

Shu Chen

,

Xiaoqing Li

NUMERICAL STUDY ON THE EFFECT OF THERMAL DIFFUSIVITY RATIO IN PHASE CHANGE HEAT TRANSFER OF CRUDE-OIL USING LATTICE BOLTZMANN METHOD

ABSTRACT
When the long distance crude-oil pipe-line is stopped, the crude-oil will solidify gradually with the decrease of the temperature in the pipe-line. The solid-liquid thermal diffusivity can reflect the ability of heat diffusion in the phase change heat transfer process of crude-oil stop-transport. Based on the mathematical model of oil phase transition heat transfer established by enthalpy method, the lattice Boltzmann method is used to solve the governing equations of oil phase transition heat transfer. According to the simulation results, the phase change heat transfer process of crude-oil is divided into three-stages, and the mechanism of the phase change heat transfer process of crude-oil is studied. The results show that the influence of solid-liquid thermal diffusion ratio increase gradually with time. When Fourier number ≥0.043, Nusselt number and convective heat transfer intensity of mobile phase interface slightly decrease with the increase of solid-liquid thermal diffusivity ratio. The research results of this paper can provide a reference for controlling the stoppage time of pipe-line.
KEYWORDS
crude oil, Phase change heat transfer, Solid-liquid thermal diffusivity ratio, Lattice Boltzmann Method
PAPER SUBMITTED: 2022-04-16
PAPER REVISED: 2022-06-02
PAPER ACCEPTED: 2022-10-11
PUBLISHED ONLINE: 2022-12-17
DOI REFERENCE: https://doi.org/10.2298/TSCI220416178L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 2, PAGES [1627 - 1639]
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Numerical study on the effect of thermal diffusivity ratio in phase change heat transfer of crude-oil using lattice Boltzmann method

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence