Road barriers are commonly used as a tool to reduce the dispersion of pollution that exists in residential areas near industrial areas or highways. In this study, two-dimensional computational fluid dynamics was conducted to simulate the impact of the road barrier on air pollution near the road. Different barrier height and velocity input will be evaluatedKeywords: air pollution, barrier, CFD modeling1.0 IntroductionIn recent years, air pollution has increased rapidly, mainly caused by industrial growth and increased vehicle use in most developing countries. This could be a risk for a number of health problems. Therefore, road barriers can be a concept for reducing pollution near the road and a tool for improving air quality. Experiments show that a road barrier leads to a decrease in the concentration of road emissions in the wake of a barrier, compared to a case without a barrier (Heist et al., 2009). Furthermore, some studies show that road barriers to air pollution such as noise barriers or vegetative barriers such as trees can have an impact on the dispersion of vehicle emissions [1]. The main objective of this study is to model the use of barriers to mitigate pollution dispersion. It is an interesting concept for barrier understanding and applications to reduce air pollution. A real case study of dispersion modeling was simulated using two types of methods. In this article, a road barrier was designed using a fluid dynamic (CFD) calculation. The aim is to investigate the presence of a barrier impact on the concentration of dispersion of polluting substances emitted by industrial traffic or near the road. Computational fluid dynamicsComputational fluid dynamics (CFD) is part of the study on fluids...... middle of the document.... .. V concentrations at barrier height 18 m with three different speeds, 3.0 m/s, 4 .0 m/s and 5.0 m/s Figure 4 above normalized the vertical concentration distribution for no barrier and different barrier heights by simulating a different speed (3 m/s wind speed, followed by 4.0 m/s if 5.0 m/s). In the absence of a barrier, the vertical pressure concentration increases when the velocity is high. In a 6 m high barrier case, the concentration increases in the vertical loft at 0-23 Y when the speed is high and starts to decrease as it mixes with the clean air above the road and starts to reduce the concentration. In Figure 4c, with the presence of a higher road barrier, the maximum concentration over which it can occur and the concentration at the upper level is higher with a higher speed. However, the barrier height and absolute concentration have an impact as the speed increases.