考虑洛伦兹力的多孔腔内纳米流体自由对流的非平衡模型。

Non-equilibrium Model for Nanofluid Free Convection Inside a Porous Cavity Considering Lorentz Forces.

作者信息

Sheikholeslami M, Khan Ilyas, Tlili I

机构信息

Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran.

Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam.

出版信息

Sci Rep. 2018 Nov 15;8(1):16881. doi: 10.1038/s41598-018-33079-6.

DOI:10.1038/s41598-018-33079-6

PMID:30442891

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6237777/

Abstract

In current article, transportation of CuO nanoparticles through a porous enclosure is demonstrated. The enclosure has complex shaped hot wall. Porous media has been simulated via two temperature equations. Magnetic force impact on nanofluid treatment was considered. Control volume based finite element method has been described to solve current article in vorticity stream function form. Single phase model was chosen for nanofluid. Nanofluid characteristics are predicted via KKL model. Roles of solid-nanofluid interface heat transfer parameter (Nhs), porosity, Hartmann and Rayleigh numbers have been illustrated. Outputs illustrated that conduction mode reduces with augment of Ra. Increasing magnetic forces make nanofluid motion to decrease. Temperature gradient of nanofluid decreases with augment of Nhs. Reducing porosity leads to enhance in Nusselt number.

摘要

在当前文章中，展示了氧化铜纳米颗粒通过多孔封闭腔的输运过程。该封闭腔具有形状复杂的热壁。多孔介质通过两个温度方程进行模拟。考虑了磁力对纳米流体处理的影响。描述了基于控制体积的有限元方法，以涡度流函数形式求解当前文章。纳米流体选用单相模型。纳米流体特性通过KKL模型进行预测。阐述了固 - 纳米流体界面传热参数（Nhs）、孔隙率、哈特曼数和瑞利数的作用。结果表明，随着瑞利数的增加，传导模式降低。增加磁力会使纳米流体运动减弱。随着Nhs的增加，纳米流体的温度梯度减小。降低孔隙率会导致努塞尔数增加。