Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 15 2 2025 05 22 Numerical and statistical study of cylindrical heat sink performance with interrupted minichannels and twisted vortex generator Numerical and statistical study of cylindrical heat sink performance with interrupted minichannels and twisted vortex generator 153 164 3557 10.22044/jsfm.2025.14607.3864 FA Reza Deriszadeh Department of Mechanical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran Alireza Falahat Iran, islamic azad university.Mahshahr branch Journal Article 2024 06 01 In the current study, fluid flow and heat transfer characteristics of water flow in a cylindrical heat sink with interrupted minichannels and twisted vortex generators are numerically evaluated. This study focuses on the determination of the influential design factors and their optimum levels. The design factors were selected at four levels comprising the angle of the vortex generators, twist angle of the vortex generators, the Reynolds number and the spacing of the vortex generators from the beginning of the interrupted section of minichannels. The output parameters in this study are included the Nusselt number, the Fanning friction factor and the total hydrothermal performance factor. To investigate the effect of design factors on output parameters, Taguchi statistical method with L16 orthogonal arrays and analysis of variance was carried out. The results demonsterated that the vortex generators, the Reynolds number and the spacing of the vortex generators play a vital role in JF with the contribution ratios of 61.59%, 11.89% and 19.22%, respectively. The twist angle of vortex generator has a small contribution to the output parameters. The optimized model is improved by 100%, 16.8% and 94% for Nu, f and JF, respectively, compared with the orginal model. In the current study, fluid flow and heat transfer characteristics of water flow in a cylindrical heat sink with interrupted minichannels and twisted vortex generators are numerically evaluated. This study focuses on the determination of the influential design factors and their optimum levels. The design factors were selected at four levels comprising the angle of the vortex generators, twist angle of the vortex generators, the Reynolds number and the spacing of the vortex generators from the beginning of the interrupted section of minichannels. The output parameters in this study are included the Nusselt number, the Fanning friction factor and the total hydrothermal performance factor. To investigate the effect of design factors on output parameters, Taguchi statistical method with L16 orthogonal arrays and analysis of variance was carried out. The results demonsterated that the vortex generators, the Reynolds number and the spacing of the vortex generators play a vital role in JF with the contribution ratios of 61.59%, 11.89% and 19.22%, respectively. The twist angle of vortex generator has a small contribution to the output parameters. The optimized model is improved by 100%, 16.8% and 94% for Nu, f and JF, respectively, compared with the orginal model. https://jsfm.shahroodut.ac.ir/article_3557_f144fa2ffa89d072e6402eb4fc14d3cc.pdf