化学工程2025，Vol.53Issue(4)：48-53,6.DOI:10.3969/j.issn.1005-9954.2025.04.009
磁场作用下弯管内铁磁流体涡流发展及其强化传热
Eddy development and heat transfer enhancement of ferrofluid in curved pipe under magnetic field
摘要
Abstract
In order to comprehensively study the effect of the external magnetic field on the heat transfer of ferrofluid in the bend,the enhanced heat transfer characteristics of the bending pipe with different curvature(K=0.014-0.02)and different magnetic field intensity(B=0-0.1 T)under different Reynolds number(Re=800-2 000)were studied by CFD simulation method based on the finite element method.The eddy current and heat transfer characteristics of ferromagnetic fluid in a bend tube with K=0.02 and B=0-0.1 T external magnetic field were mainly analyzed.The results show that after applying a large external magnetic field at low Reynolds number,the coupling effect of centrifugal force and magnetic force causes the fluid in the tube to produce a complex swirl flow,and Nu increases significantly.In the studied range of K and Re,compared with no magnetic field,Nu increases by 42.36％to the maximum when applying a magnetic field of B=0.1 T to the curved pipe,and the smaller the curvature,the more obvious the heat transfer effect.When Re is large,applying a magnetic field of B=0.1 T to the three curved pipes can slightly inhibit the fluid heat transfer.To sum up,when the Reynolds number is low and the curvature is small,applying a certain external magnetic field to the bent pipe can significantly enhance its heat transfer.关键词
弯管/铁磁流体/磁场/强化传热/多场耦合Key words
curved pipe/ferromagnetic fluid/magnetic field/enhancement heat transfer/multi-field coupling分类
能源与动力引用本文复制引用
王翠华,王鑫皓,隋佳旭,张先珍,龚斌..磁场作用下弯管内铁磁流体涡流发展及其强化传热[J].化学工程,2025,53(4):48-53,6.基金项目
辽宁省教育厅面上项目(LJKZ0447,LJKMZ20220775) （LJKZ0447,LJKMZ20220775）
