Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 98, Issue 1 (2022) 67-72 67 Journal of Advanced Research in Fluid Mechanics and Thermal Sciences Journal homepage: https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/index ISSN: 2289-7879 Numerical Study of The Effects of Vehicle Arrangement on Aerodynamics Resistance Fudhail Abdul Munir 1, *, Muhammad Najhi Fauzi 1 , Ridhwan Jumaidin 2 1 Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia 2 Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia ARTICLE INFO ABSTRACT Article history: Received 14 March 2022 Received in revised form 18 June 2022 Accepted 27 June 2022 Available online 23 July 2022 The cause of drag force vehicle accounts high fuel losses. Fuel consumption is adversely affected due to aerodynamic forces, which specially is the drag force. Vehicles that are moving in certain arrangement allows for a significant decrease in fuel consumption at highway speeds by reducing the aerodynamic drag on the moving vehicles. In this paper, the effect of vehicle arrangement on the aerodynamic resistance was numerically investigated. The vehicle models were arranged back-to-back with difference distances between each other. The distance was varied with 1.5 m, 2.0 m and 2.5 m. Computational Fluid Dynamics (CFD) was performed using ANSYS-Fluent software. The results in terms of drag coefficient were obtained for each of distance setting. There are nine different arrangements were studied. It was found out that the lowest average drag force of which 0.1857 experienced by vehicle model that are arranged at the distance of 1.5m and 2.5 m. This average drag coefficient shows a reduction of 26.8%. Consequently, the aerodynamics resistance can be significantly reduced by having a proper arrangement of vehicle cruising in highways. Keywords: Computational Fluid Dynamics (CFD); drag force; fuel consumption 1. Introduction Aerodynamic resistances comprise of about 80% of drag force that can significantly affect the vehicle fuel consumption [1,2]. This resistance becomes larger when the vehicle moves faster [3-5]. Meanwhile, the stringent emission requirement from the European Union imposed on vehicle manufacturers in effort to reduce air and noise pollution have sparked flourishing research progress in the field. Significant progress has been made on examining the effect of vehicle arrangement on aerodynamic drag. Since drag is one of the determining factors in aerodynamic performance, various lead-ing or positioning and vehicle body configuration offer increased efficiency. Prominent examples of such configuration is cycling platoon where riders in at the tail end of platoon have drag of approximately 10% of what isolated rider is experiencing [6]. The concept of reducing road vehicle drag by harnessing the aerodynamic interference between closely spaced vehicles has acquired * Corresponding author. E-mail address: fudhail@utem.edu.my https://doi.org/10.37934/arfmts.98.1.6772