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All Journal International Journal of Aviation Science and Engineering Open Science and Technology
Pinindriya , Sinung Tirtha
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Environmental Science Mechanical Engineering Transportation

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Numerical Simulation of Droplet Behavior under Varying Density Ratios Using Finite Volume-Front Tracking Method Kurniawan, Dondi; Yoanita, Yulia Venti; Pinindriya , Sinung Tirtha; Eli Kumolosari; Angga Darma Prabowo; M. Rangga Saputra
International Journal of Aviation Science and Engineering - AVIA Vol. 6 No. 2: (December, 2024)
Publisher : FTMD Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/avia.v6i2.137

Abstract

The study of droplet dynamics is very important to understand the mechanism of heat, mass, and momentum transfer in two phases. One approach to studying this phenomenon is through numerical simulation. The front tracking method is one of the techniques often used in numerical simulation of droplets to handle phase interactions in multiphase flows. This study aims to study the characteristics of droplets when they collide with surfaces with varying density values. The modeling used in this study is an interface diffusion approach using 2 types of fluids that have different properties. The domain used is Square Box-Staggered Grid. The software used is MATLAB R2024a. The results of the study indicate that the density ratio has a significant effect on the spreading factor, apex height, spreading velocity and pressure.
Effect of Gurney Flap on The Flow Separation Phenomenon on The Rear Wing Airfoil of Racing Car Kurniawan, Dondi; Yoanita, Yulia Venti; Pinindriya , Sinung Tirtha; Kumolosari, Eli; Prabowo, Angga Darma
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.150

Abstract

Background: A racing car must be able to run at high speeds. To achieve this goal, vehicle aerodynamic modifications are often carried out, one of which is adding a gurney flap (GF). The GF on a racing car function to delay the flow separation, increase the downforce value, and reduce the drag force.Aims & Methods: In this study, observations of the influence of GF were carried out by numerical simulation using Solidworks 2025 by varying the speed of 250, 320, and 400 km/h at an angle of attack of 0°, with and without GF. The aim is to obtain information on the influence of these variations on the flow separation phenomenon on the rear wing airfoil.Result: The results showed that the addition of GF caused a delay in flow separation and a decrease in wake/vortex behind the airfoil. The impact was that the drag force increased at low speeds (39.97% at 250 km/h) but showed a decrease at medium and high speeds, namely -7.91% at 320 km/h and -2.31% at 400 km/h.
Co-Authors Angga Darma Prabowo Eli Kumolosari Kurniawan, Dondi M. Rangga Saputra Yoanita, Yulia Venti