# Aerodynamic Drag Study of the Heat Exchange Equipment with Different Fin Geometries
###### Abstract  
This article is devoted to the method of numerical modelling of aerodynamics when the air flows around fins of a special design, which is implemented in SolidWorks Flow Simulation. The study was carried out for three types of rib orientation, and the aerodynamic drag coefficients were determined for different values of the Reynolds number. It was confirmed that the drag coefficient values depend significantly on the flow regime. The lowest value of the drag coefficient is observed when the fins are oriented from a larger diameter to a smaller one. In the laminar regime (Re \(<\) 2300), the average value of \(C_{X}\) = 1.04, in the transitional regime (2300 \(<\) Re \(<\) 10,000), \(C_{X}\) = 0.74, and in the turbulent regime (Re \(>\) 10,000), \(C_{X}\) = 0.22. Characteristic for this case of orientation is a significant decrease in the drag coefficient during the transition from laminar to turbulent regime; the minimum is observed at the flow speed in the range between 2 and 3 m/s. a +
Footnote †: journal:  
0000-0002-4000-0000-0000-0000-0000-0000-00000-0000-0000-00000-00000-00000-00000-00000-00000-00000-00000-00000-00000-000000-000000-000000-000000-000000-0  
[PERSON] and others in their work investigate the impact of fitting fins at the corners of a square cylinder on its aerodynamic characteristics [12]. The study utilizes both wind tunnel tests and large eddy simulations (LES) to systematically evaluate the effect of corner fins on the aerodynamics of the square cylinder. The research explores three types of corner fin configurations: fins fitted to leading corners only, fins fitted to trailing corners only, and fins fitted to both leading and trailing corners. The study aims to provide a comprehensive understanding of how these different configurations influence aerodynamic characteristics, including mean drag coefficient, fluctuating lift coefficient, and vortex shedding of the cylinder. The article discusses the potential practical significance of the findings, such as reducing aerodynamic forces, wind-induced vibrations of infrastructures, and enhancing wind-induced vibration-based energy harvesting. However, the specific applications and practical implementations of these findings are not deeply explored. Future research could delve into specific engineering applications and assess the feasibility and effectiveness of implementing corner fins in real-world scenarios. The primary objective of [PERSON]'s article is to investigate and present measurements of the drag coefficients for a variety of air rifle pellets with a predominant caliber of 4.5 mm (0.177 in) [13]. The research includes systematic alterations to the geometry of some pellets to understand how specific features impact the drag coefficient. The article focuses on the influence of pellet geometry, nose shape, and tail length on the drag coefficient. Additionally, the study explores the effects of air velocity on drag coefficients for various types of sports pellets. However, the study primarily focuses on a small object with a size of 4.5 mm without significant fins which could not give comprehensive understanding of how aerodynamic characteristics vary with different sizes. [PERSON], [PERSON], and others investigate the impact of different grid fin patterns on subsonic flow aerodynamics, specifically focusing on their respective aerodynamic forces [14]. The study further explores the influence of gap variations on the aerodynamics of these grid fin patterns. The results highlight enhanced aerodynamic efficiency, lift slope, and performance for certain grid fin patterns compared to a baseline model, providing insights for optimizing grid fin design based on aerodynamic efficiency, stall angle requirements, and construction cost. The article briefly mentions previous studies comparing grid fins with conventional planar fins.