Numerical Investigation of the Transient Hydrothermal Behavior of a Ferrofluid Flowing Through a Helical Duct in the Presence of Nonuniform Magnetic Field

被引:11
作者
Aminfar, Habib [1 ]
Mohammadpourfard, Mousa [2 ]
Zonouzi, Sajjad Ahangar [1 ,3 ]
机构
[1] Univ Tabriz, Fac Mech Engn, Tabriz 5166616471, Iran
[2] Azarbaijan Shahid Madani Univ, Dept Mech Engn, Tabriz 5375171379, Iran
[3] Razi Univ, Dept Mech Engn, Kermanshah 5155856865, Iran
来源
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 2014年 / 136卷 / 06期
关键词
ferrofluid; helical duct; nonuniform magnetic field; heat transfer; mixture model; BIOMAGNETIC FLUID-FLOW; HEAT-TRANSFER; NATURAL-CONVECTION; SIMULATION; MIXTURE;
D O I
10.1115/1.4026487
中图分类号
O414.1 [热力学];
学科分类号
摘要
This paper investigates numerically the time dependent hydrothermal behavior of a ferrofluid (water and 4 vol. % Fe3O4) flowing in a helical channel, which is exposed to a nonuniform transverse magnetic field and its walls are subjected to uniform heat flux. The two phase mixture model and control volume technique have been used to study the flow. The results show that applying the nonuniform transverse magnetic field considerably increases the velocity and flow rate in the vicinity of the channel walls while it significantly decreases the velocity at the center of the channel. Applying magnetic field also decreases considerably the temperature of the inner wall of the helical channel. Furthermore, the average Nusselt number is increased by applying the nonuniform transverse magnetic field and it is more enhanced by increasing the magnetic field intensity.
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页数:12
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