1 School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China; 2 Institute of Chemical Materials, China Academy of Engineering Physics (CAEP), Mianyang 621900, China; 3 Beijing Computational Science Research Center, Beijing 100048, China; 4 College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
Abstract The incorporation of graphene fillers into polymer matrices has been recognized for its potential to enhance thermal conductivity, which is particularly beneficial for applications in thermal management. The uniformity of graphene dispersion is pivotal to achieving optimal thermal conductivity, thereby directly influencing the effectiveness of thermal management, including the mitigation of local hot-spot temperatures. This research employs a quantitative approach to assess the distribution of graphene fillers within a PBX (plastic-bonded explosive) matrix, focusing specifically on the thermal management of hot spots. Through finite element method (FEM) simulations, we have explored the impact of graphene filler orientation, proximity to the central heat source, and spatial clustering on heat transfer. Our findings indicate that the strategic distribution of graphene fillers can create efficient thermal conduction channels, which significantly reduce the temperatures at local hot spots. In a model containing 0.336% graphene by volume, the central hot-spot temperature was reduced by approximately 60 K compared to a pure PBX material, under a heat flux of 600 W/m. This study offers valuable insights into the optimization of the spatial arrangement of low-concentration graphene fillers, aiming to improve the thermal management capabilities of HMX-based PBX explosives.
Received: 12 December 2024
Revised: 11 February 2025
Accepted manuscript online: 25 February 2025
PACS:
44.05.+e
(Analytical and numerical techniques)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. U2330208).
Corresponding Authors:
Yuxiang Ni
E-mail: yuxiang.ni@swjtu.edu.cn
Cite this article:
Xuanyi Yang(杨烜屹), Xin Huang(黄鑫), Chaoyang Zhang(张朝阳), Yanqing Wang(王延青), and Yuxiang Ni(倪宇翔) Finite element analysis of the impact of graphene filler dispersion on local hotspots in HMX-based PBX explosives 2025 Chin. Phys. B 34 054401
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