化工学报2019，Vol.70Issue(z2)：130-137,8.DOI:10.11949/0438-1157.20190530
具有质热源的方腔内对流传热传质及其非线性特性
Study on heat and mass transfer and nonlinear characteristics with heat and mass source in cavity
摘要
Abstract
In this paper, a square cavity with mass and heat source was studied with the background of fire. According to the different Rayleigh number(Ra) and buoyance ratio Nc, Sr and Df, the heat and mass transfer law and nonlinear characteristics of the fluid in the cavity are discussed. The results show that the critical Rac causes the fluid flow to change from the heat-induced driving flow to the convection-driven flow. As Ra increases the heat and mass transfer of the surface of the heat and mass source, the fluid changes from steady-state flow to oscillating state. When Nc>?1, the convective heat transfer coefficient and the convective mass transfer coefficient increase, and the fluid transforms from steady state to double-period oscillation, and finally to chaos. Increasing Sr and Df can increase flow and heat and mass transfer.关键词
质热源/数值模拟/传热传质/振荡/混沌Key words
mass and heat source/ numerical simulation/ heat and mass transfer/ oscillation/ chaos分类
能源科技引用本文复制引用
李钰冰,杨茉,陆廷康,戴正华..具有质热源的方腔内对流传热传质及其非线性特性[J].化工学报,2019,70(z2):130-137,8.基金项目
国家自然科学基金项目(51736007,51476103) （51736007,51476103）
上海市质量技术监督局科研项目(2018-54) （2018-54）
