郑州大学学报（工学版）2024，Vol.45Issue(3)：103-110,8.DOI:10.13705/j.issn.1671-6833.2024.03.004
基于LBM的低导热材料板强化沸腾换热机理分析
Analysis of Enhanced Boiling Heat Transfer Mechanism Using Low Thermal Conductive Material Plate Based on LBM
摘要
Abstract
In order to further enhance boiling heat transfer,multiple low thermal conductive material plates were embedded near the upper wall of the solid heater,alternating temperature variations with space on the heating sur-face for boiling heat transfer were obtained in this study.The single-component multiphase lattice Boltzmann meth-od was used to investigate the effects of the number and gap spacing of low thermal conductive material plates on boiling heat transfer performance and bubble dynamics,the mechanism of enhancing boiling heat transfer by adding low thermal conductive material plates was revealed from a microscopic perspective.The results indicated that the dynamic behavior of bubbles changed with the increase of gap spacing,leading to bubble merging,independent growth,and other bubble detachment processes.Based on the analysis of bubble dynamic behavior,temperature field,and flow field,it was found that bubbles first nucleated and grew at the gap heated surface,the vortex separa-ted from bubbles could promote the lateral migration and merging process of growing bubbles on the heated surface.Morever,within a certain gap spacing range,bubbles would fuse with each other to form a liquid bridge,which could promote the evaporation of the micro layer around the root of the bubbles on the heated surface,and pushed the cold fluid to wet the gap heated surface again.The combined effects of adding multiple low thermal conductive material plates,heat accumulation at gaps,bubble merging to forma liquid bridge,re-wetting of gap heated sur-faces,lateral migration of bubbles,and rapid merging of multiple bubbles could enhance boiling heat transfer per-formance.关键词
低导热材料板/气泡动力学/格子玻尔兹曼方法/气液两相流/强化换热Key words
low thermal conductive material plate/bubble dynamics/LBM/gas-liquid two-phase flow/heat trans-ferenhancement分类
能源科技引用本文复制引用
曹海亮,刘红贝,张子阳,赵晓亮,郭赛..基于LBM的低导热材料板强化沸腾换热机理分析[J].郑州大学学报（工学版）,2024,45(3):103-110,8.基金项目
河南省重点研发与推广专项项目(192102210143) （192102210143）
