The Effect of Using Sinusoidal Profile in Fins on Thermal Performance

Abstract

The aim of the present study is to investigate the effect of using sinusoidal profile in fins on temperature distribution and heat transfer enhancement. The longitudinal fins of rectangular, triangular, wavy rectangular and wavy triangular profiles are studied using analytical and numerical solution techniques. In addition to known profiles, wavy triangular longitudinal fins are proposed as a new fin configuration. The temperature distribution of wavy triangular fins is obtained using Shooting Method along with Cash-Karp Runge Kutta Method. Besides, CFD analyses in which laminar flow regime is concerned at different air velocities is utilized for the comparison of heat transfer rates and convective heat transfer coefficients. CFD results show that heat transfer convection coefficient values for wavy rectangular fins are the lowest ones among the investigated fins. CFD and analytical results indicate that for lower convective coefficients, the dominancy of triangular fins having wave form on plate type triangular fins is more noticeable than the dominancy of wavy rectangular fins on plate type rectangular fins. Also, further heat transfer augmentation can be provided for wavy triangular fins at higher amplitude lengths. For instance, heat transfer enhancement by 15.3 % can be achieved using wavy triangular fins with thickness of 2 cm, amplitude length of 0.21 cm and three-wave profile in comparison with triangular fins having same dimensions.

Investigation of the thermal analysis of a wavy fin with radiation impact: an application of extreme learning machine

“…The solution of B is computed by equation (20) where, the M-P pseudo inverse is represented by + M .…”

“…Fins are practical apparatuses to dissipate heat from other electrical components, including computer processors and are significant in heat transfer applications such as heat evaporators, compressors, and internal combustion engines. Using the Runge-Kutta approach, Sertel and Bilen [20] studied heat transfer in a longitudinal fin. The analytical solution for a radiative rectangular fin was discussed by Gouran et al [21] with the aid of LSM and they discussed the radiative heat transfer mechanism in the fin.…”

Effect of Fin Length and Location on Natural Convection Heat Transfer in a Wavy Cavity

“…They discovered the effect of Rayleigh number, fin lengths and fin positions on the flow structure and heat transfer behaviors. Sertel and Bilen [13] reported the effect of using sinusoidal profile in fins on thermal performance. They found that the heat transfer augmentation can be provided for wavy triangular fins at higher amplitude lengths.…”

Stochastic Levenberg–Marquardt Neural Network Implementation for Analyzing the Convective Heat Transfer in a Wavy Fin

“…Furthermore, most of the research works were based on the experimental investigation of the heat transfer of fin-and-tube and plate-fin heat exchangers with wavy fins [29][30][31][32][33][34]. However, the studies of Sertel and Bilen [35] and Khaled [36] discuss the various types of wavy fins to recognize the thermal augmentation attributes. In particular, Khaled [36] studied the thermal variation in the wavy fin with constant thermal conductivity.…”