# Computational Analysis of Passive Flow Control by Vortex Generator around Vehicle Model
> Tarakka R.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_105034738698
Jurnal / Konferensi: Journal of Physics Conference Series
Tahun terbit: 2026
DOI: https://doi.org/10.1088/1742-6596/3186/1/012033
ISSN: 17426588
Citations: 0

## Authors
- Tarakka R.

## Abstract
Abstract The goal of reducing aerodynamic drag is crucial for improving vehicle fuel efficiency and lowering emissions, particularly in bluff-body vehicles undergoing significant wake-induced drag. This research explores the aerodynamic characteristics of a modified Ahmed body model through computational fluid dynamics (CFD) simulations conducted in ANSYS Fluent. The main objective is to assess the impact of passive flow control by embedding a vortex generator at the rear of the vehicle, with inclination angles ranging from 0° to 30°. The baseline model shows considerable wake formation due to early flow separation, leading to a high drag coefficient of 0.864 and a notably negative rear pressure coefficient of -0.306. Implementing the vortex generator effectively delays separation, reduces the wake size, and enhances rear pressure recovery. The best aerodynamic performance is observed at a vortex generator inclination angle of 20°, where the drag coefficient decreases by 8.68% and the average rear pressure coefficient improves to -0.1936. Beyond 20°, the effectiveness declines due to increased flow disturbances and turbulence, causing a rise in drag. These results confirm the angle-dependent behavior of vortex generators and their potential for passive drag reduction, aligning with existing literature. The findings provide valuable insights for optimizing the aerodynamics of ground vehicles using cost-effective, energy-efficient flow control methods.

## Keywords
- Vortex generator
- Aerodynamics
- Drag coefficient
- Wake
- Drag
- Vortex
- Mechanics
- Aerodynamic drag
- Flow (mathematics)
- Wake turbulence
- Flow control (data)
- Generator (circuit theory)
- Aerospace engineering
- Pressure coefficient
- Lift-induced drag
- Total pressure
- Engineering
- Physics
- Marine engineering
- Lift-to-drag ratio
- Control theory (sociology)
- Vortex shedding
- Computational fluid dynamics
- Zero-lift drag coefficient
- Lift coefficient
- Flow separation
- Parasitic drag
- Aerodynamic force
- Environmental science
- Angle of attack
- Ground effect (cars)

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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