Field synergy analysis for enhancing heat transfer capability of a novel narrow-tube closed oscillating heat pipe

• Published in: Applied energy 2016-08, Vol.175, p.218-228
• Main Authors: Jiaqiang, E., Zhao, Xiaohuan, Liu, Haili, Chen, Jianmei, Zuo, Wei, Peng, Qingguo
• Format: Article
• Language: English
• Subjects: Closed oscillating heat pipe; Computational fluid dynamics; Computer simulation; Cooling; Field Synergy Principle; Fluids; Heat and mass transfer; Heat pipes; Heat transfer; Oscillating; Strengthening; Thermal performance; Volume of fluid
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2016.05.028

[Display omitted] •Step backward established is to alter the oscillation direction of COHP for the first time.•Heat transfer capability of COHP closed-system is enhanced by Field Synergy Principle (FSP).•A novel narrow-tube COHP is of advantages in dynamic oscillating capability.•Flow patterns and distribution uniformity can be changed obviously by FSP calculation. It is really important for a closed oscillating heat pipe (COHP) system to achieve a higher heat dissipation capacity. In this work, a novel narrow-tube closed oscillating heat pipe model with two backward steps is proposed to enhance its heat transfer ability that is attributed to the oscillation cycle in a fixed direction. Volume of fluid (VOF) simulations and related experiments are performed to investigate the vapor, the temperature distribution and the thermal performance of the COHP. Compared with conventional heat pipe, the results indicate that the novel narrow-tube closed oscillating heat pipe has advantages in the vapor uniform, the heat transfer and the oscillation motion. Field Synergy Principle (FSP) is employed to investigate the reasons for the improvement of the heat transfer capability of the novel COHP, which provides a better guide for strengthening the heat dissipation capacity of the COHP system.