摘要
利用格子Boltzmann方法模拟了磁场作用下多孔方腔内的交叉扩散现象,讨论了孔隙率E、达西数Da、哈特曼数Ha、磁场角γ、索瑞特数S_(r)、杜佛尔数D_(f)对平均努谢尔特数Nu_(ave)和平均宣乌特数Sh_(ave)的影响,并利用场协同原理解释了这些因素的作用机理。结果表明:孔隙率和达西数的增加能够强化传热传质;哈特曼数的增加则削弱了传热传质的发生;磁场与水平面的夹角在[-π,π]的范围内增大时,传热传质强度基本不变;单一增大杜佛尔数会显著强化传热,但可能会削弱传质的发生;单一增大索瑞特数,则传热传质同时增强。
The cross-diffusion phenomenon in a porous cavity under the effect of a magnetic field was simulated by lattice Boltzmann method.The effects of porosity E,Darcy number Da,Hartman number Ha,magnetic field angleγ,Soret number S_(r),Dufour number D_(f)on average Nusselt number Nu_(ave)and average Sherwood number Sh_(ave) were discussed,and the field synergy principle was used to explain the mechanism of action of these factors.The results are as follows:the increase of porosity and Darcy number can enhance the of heat and mass transfer;the increase of Hartmann number weakens the occurrence of heat and mass transfer;when the angle between the magnetic field and the horizontal plane increased in the range of[-π,π],the heat and mass transfer intensity is basically unchanged;single increase in the Dufour number may significantly enhance heat transfer,but may weaken the occurrence of mass transfer;single increase in the Soret number can result in heat and mass transfer enhancement at the same time.
作者
范烈豪
张明阳
FAN Liehao;ZHANG Mingyang(Department of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)
出处
《鲁东大学学报（自然科学版）》
2022年第2期158-164,170,共8页
Journal of Ludong University:Natural Science Edition
基金
山东省自然科学基金青年基金(ZR2020QE204)
山东建筑大学博士基金(X18068Z)。
关键词
交叉扩散
传热传质
场协同理论
cross diffusion
heat and mass transfer
field synergy principle
