THERMAL SCIENCE

International Scientific Journal

Yang Zhang

,

Ben-Gao Yang

,

Jing Xie

,

Rui-Feng Tang

,

Yan-Bo Bai

,

Ming-Zhong Gao

STUDY ON HEATING CHARACTERISTICS OF GRANITES WITH DIFFERENT SIZES IN MICROWAVE FIELD

ABSTRACT
Studying the heating characteristics of rocks in a microwave field is fundamental to exploring the mechanism of microwave rock breaking. Therefore, a heterogeneous granite model was established using COMSOL Multiphysics to deeply analyze the specific influence of rock size on rock heating characteristics in a microwave field. The results show that with the increase of rock size, the heating rate of rock exhibits a fluctuation characteristic. This phenomenon occurs because changes in rock size leads to variations in both the magnitude and spatial arrangement of electric field intensity. Further analysis of the electromagnetic loss of granite reveals that increasing rock volume can significantly enhance microwave energy utilization ef­ficiency. Additionally, biotite occupying only 8% of the rock volume, absorbs over 55% of the microwave energy, highlighting the significant impact of biotite content on the heating characteristics of granite.
KEYWORDS
microwave heating, sizes effect, numerical model, granite
PAPER SUBMITTED: 2024-03-05
PAPER REVISED: 2024-03-08
PAPER ACCEPTED: 2024-05-15
PUBLISHED ONLINE: 2024-09-28
DOI REFERENCE: https://doi.org/10.2298/TSCI2404511Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 4, PAGES [3511 - 3516]
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Study on heating characteristics of granites with different sizes in microwave field

© 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