Effects of vibration frequency on random stacking and heat transfer traits in a packed bed

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-09-30 DOI:10.1016/j.ijthermalsci.2025.110346

Zhihao Hu, Peng Sun, Tengfei Gao, Yujiao Gui, Ziqi Mu, Zhongliang Zhang, Bin Zheng

引用次数: 0

Abstract

To obtain the effect of vibration frequency on the random stacking characteristics and contact heat transfer characteristics of a heat storage particle pile, the random stacking and heat transfer model of heat storage particle piles in particle heat storage tanks was established. 0–25 Hz was selected as the parameter of vibration frequency for investigation. The results showed that the particle packing rate and specific contact number after vibration increased by 7 % and 7.6 %, respectively, compared with those of the particle pile before vibration. The maximum increase in the local packing rate is 21.7 %, which was observed near the heat transfer wall. The average coordination number is maximized to 4.07, and the particle coordination number dispersion is more concentrated. The condition of 5 Hz showed the best random stacking and heat transfer traits.

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振动频率对填料床内随机堆积和传热特性的影响

为获得振动频率对储热颗粒桩随机堆积特性和接触传热特性的影响，建立了颗粒储热罐中储热颗粒桩的随机堆积传热模型。选取0 ~ 25 Hz作为振动频率参数进行研究。结果表明：与振动前相比，振动后颗粒桩的堆积率和比接触数分别提高了7%和7.6%；在传热壁附近，局部填料率的最大增幅为21.7%。平均配位数最大，达到4.07，颗粒配位数分散更加集中。5 Hz条件下随机叠加和传热性能最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.