期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于低雷诺数κ-ε模型冲击射流传热的数值模拟 被引量:4
1
作者 朱泽辉 聂欣 廖海波 《水电能源科学》 北大核心 2021年第4期157-160,203,共5页
冲机射流在机翼除霜、电子元器件散热等工程领域应用广泛,为进一步研究其传热机理,利用两种低雷诺数κ-ε模型对单股冲击射流的传热进行数值模拟,并与标准κ-ε模型及雷诺应力模型的计算结果进行对比。结果表明,低雷诺数κ-ε模型在两... 冲机射流在机翼除霜、电子元器件散热等工程领域应用广泛,为进一步研究其传热机理,利用两种低雷诺数κ-ε模型对单股冲击射流的传热进行数值模拟,并与标准κ-ε模型及雷诺应力模型的计算结果进行对比。结果表明,低雷诺数κ-ε模型在两种工况下的计算结果均优于其他模型。湍流热扩散系数作为求解温度场最重要的参数,对传热的计算结果影响极大,通常用湍流普朗特数作为常数求解。在低雷诺数κ-ε模型的基础上,分别通过湍流普朗特数函数求解和t2-εt方程直接求解进行改进,并将计算结果进行比较。结果表明,使用湍流普朗特数函数形式求解湍流热扩散系数能给出更好的预测结果,直接求解仍需进一步改进。 展开更多
关键词 冲击射流 传热 低雷诺数κ-ε模型 湍流热扩散系数 湍流普朗特数
原文传递
Conjugate Effects of Heat and Mass Transfer on Natural Convection Flow along an Isothermal Sphere with Radiation Heat Loss
2
作者 Salina Aktar Mahmuda Binte Mostafa Ruma Md. Abdul Alim 《Open Journal of Fluid Dynamics》 2013年第2期86-94,共9页
Conjugate effects heat and mass transfer on free convection flow across an isothermal sphere immersed in a viscous incompressible fluid in the presence of species concentration with radiation heat loss has been invest... Conjugate effects heat and mass transfer on free convection flow across an isothermal sphere immersed in a viscous incompressible fluid in the presence of species concentration with radiation heat loss has been investigated in this paper. The governing boundary layer equations are first transformed into a non-dimensional form and the resulting nonlinear systems of partial differential equations are then solved numerically using Finite—difference method with Keller-box Scheme. We have focused our attention on the evaluation velocity profiles, temperature profiles and species concentration profiles of the fluid as well as the local skin friction coefficient, local heat transfer rate and local species concentration transfer rate for a wide range of radiation parameter Rd, Schmidt number Sc and Prandlt number Pr. 展开更多
关键词 NATURAL Convection RADIATION Heat Loss SKIN-FRICTION Nusselt number SCHMIDT number prandlt number
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部