Thermophysical Characteristics of the Ferrofluid in a Vertical Rectangle

Entropy

Jae-Hyeong Seo⁴  Byoung-Hee You²  Sang-Seuk Kwen¹  Dong-Yeon Lee³ 

[1] Daegyeong Regional Division, Korea Institute of Industrial Technology, 13-13 Hayang-ro, Gyeongsan-si, Gyeongsangbuk-do 712-702, Korea; E-Mail:;Department of Engineering Technology, College of Science and Engineering, Texas State University, 601 University Drive, San Marcos, TX 78666, USA; E-Mail:;School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea;Department of Mechanical Engineering, Dong-A University, Busan 604-714, Korea; E-Mail:

关键词: ferrofluid;    magnetic field;    thermophysical behavior;    vertical rectangle;   

DOI  :  10.3390/e17020903

来源: mdpi

【 摘 要 】

The article aimed to analytically investigate the thermophysical behaviors of a ferrofluid in a vertical rectangle with the variation of intensity of the magnetic field, viscosity of the ferrofluid and boundary conditions. The governing equations of the ferrofluid include the continuity, momentum and energy equations for describing the thermal-fluidic behaviors of the ferrofluid and the Maxwell equation and magnetization equation are also added to consider rotating effect of the nano-sized particles. The flow behavior and heat transfer characteristics of the ferrofluid with the intensity of the magnetic field, viscosities of the ferrofluid and boundary conditions were analyzed through isotherms, velocity profiles and both mean and local Nusselt numbers. As a result, the isotherms of the ferrofluid in the vertical rectangle increased with the increase of the magnetic volume fractions and magnetic field intensities. In addition, the mean Nusselt numbers increased with the increase of magnetite volume fractions at all magnetic field intensities because of the combined effects of both heat conduction by magnetite and the magnetic volume force.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland