UNSTEADY OVERALL THERMAL RESISTANCES RELATED TO HEAT CONDUCTION FOR POROUS MEDIA HAVING HIGH BIOT NUMBERS
Author:
Abstract
This study examines the means of determining the unsteady overall heat transfer coefficients for porous media with high Biot numbers. Changes in temperature during the cooling process are estimated using numerical simulations. In addition, the unsteady volume averaged internal thermal resistance values related to heat conduction in porous materials are obtained over the range of thermal conductivity ratios from 0.01 to 1000. A novel formula for calculation of the volume averaged internal thermal resistance for porous materials is devised as the functions of the Biot number and the Fourier number. This model is validated by comparing the outlet temperatures obtained using numerical simulations. The superiority of this newly developed model is also confirmed by comparison with a conventional approach. The new model can reproduce the unsteady temperature development in porous media having Biot numbers ranging from 0.01 to 100. It shows that this newly developed model can be applied in a wider range of Biot numbers than the conventional approach.
Publisher
Begell House
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science,Biomedical Engineering,Modeling and Simulation
Link
https://www.dl.begellhouse.com/download/article/6b1e6a2b2d891893/JPM-43649.pdf
Reference27 articles.
1. Carbonell, R.G. and Whitaker, S., Heat and Mass Transfer in Porous Media. In Fundamentals of Transport Phenomena in Porous Media, NATO ASI Ser. (Ser. E: Appl. Sci.), vol. 2, pp. 21-198, 1984.
2. Cheng, P., Heat Transfer in Geothermal Systems, Adv. Heat Transf., vol. 14, pp. 1-105, 1979.
3. Forooghi, P., Abkar, M., and Saffar-Avval, M., Steady and Unsteady Heat Transfer in a Channel Partially Filled with Porous Media under Thermal Non-Equilibrium Condition, Porous Media, vol. 86, pp. 207-228, 2011.
4. Grangeot, G., Quintard, M., and Whitaker, S., Heat Transfer in Packed Beds: Interpretation of Experiments in Terms of One- and Two-Equation Models, 10th Int. Heat Transfer Conf., Brighton, UK, 1994.
5. Jiang, F., Luo, L., and Chen, J., A Novel Three-Dimensional Transient Model for Subsurface Heat Exchange in Enhanced Geothermal Systems, Heat Mass Transf., vol. 41, pp. 57-62, 2013.
1.学者识别学者识别
2.学术分析学术分析
3.人才评估人才评估
"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370
www.globalauthorid.com
TOP
Copyright © 2019-2024 北京同舟云网络信息技术有限公司 京公网安备11010802033243号 京ICP备18003416号-3