Hits:

Date of Publication:2022-10-06

Journal:大连理工大学学报

Affiliation of Author(s):能源与动力学院

Issue:1

Page Number:36-41

ISSN No.:1000-8608

Abstract:The streamlines and isotherms in a closed cavity are simulated for nanofluid natural convection with lattice Boltzmann method at different nanoparticles volume fractions and different buoyancy parameters. The heat transfer intensity of nanofluid changing with the parameters is obtained. The experimental results show that conduction dominates the heat transfer process when Rayleigh number is smaller, while at larger Rayleigh number convection dominates the process. In either condition the heat transfer will be enhanced with the rise of nanoparticles volume fraction. And near the wall the nanoparticles volume fraction has more obvious effect on the isotherms than in the core region. At different Rayleigh numbers, nanoparticles volume fraction has different effects on the velocity peak values in X and Y directions. When Rayleigh number is larger, the velocity peak values in X and Y directions will increase markedly with rise of nanoparticles volume fraction.

Note:新增回溯数据