Numerical simulation of the heat transfer characteristics of a thermosyphon heat pipe with different tilt angles and filling ratios | ||
| Kerbala Journal for Engineering Sciences | ||
| Volume 3, Issue 4, December 2023, Pages 210-233 PDF (1.66 M) | ||
| Document Type: Research Article | ||
| Authors | ||
| Ali Hakim* 1; Fadhel N. Al-Mousawi1; Nabeel S. Dhaidan1; Ahmed A. Alammar2 | ||
| 1College of Engineering, University of Kerbala | ||
| 2Centre for sustainable cooling/ school of chemical engineering/ University of Birmingham | ||
| Abstract | ||
| Computational Fluid Dynamic modeling of a heat pipe can be utilized for investigating the complex physical phenomena of phase change process during the evaporation and condensation in thermosyphon heat pipes. In this study, FLUENT (ANSYS 22) was used to perform a numerical simulation of two-phase flow inside a thermosyphon heat pipe to investigate the effect of both the filling ratio and the inclination angle of the heat pipe on the thermal performance in terms of thermal resistance and temperature distribution. The results were compared with a published research, displaying a good agreement with a highest deviation in the temperature distribution of about 6.3%. According to the results, at a filling ratio of 65%, the average temperature of the evaporator walls was at its lowest, while at a filling ratio of 25%, it was at its highest. At all values of heat input, the lowest total thermal resistance was attained at a tilt angle of 90° and a filling ratio of 65%. Thermal resistance decreases as the heat input increases, and the effects of the filling ratio and tilt angle also become more significant as the heat input rises. Additionally, at a heat input of 400 W, a filling ratio of 65%, and a tilt angle of 90°, the bubbles begin to form at time 1 second, and the vapor rises to the condenser section starting at time 20 second, carrying with it the thermal energy. While condensation begins at time 27 second. | ||
| Keywords | ||
| Numerical Simulation; Heat Pipe; Thermosyphon; Filling Ratio; Tilt Angle | ||
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