PSI - Issue 63

Ivan Kolos et al. / Procedia Structural Integrity 63 (2024) 13–20

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Some articles published in previous years have been devoted to this topic. A study Vacek et al. (2022) deals with the same issue in a similar location. The result of their work is an experimental research on the measurement of the amount of salt in the vicinity of the road and the evaluation of average corrosion loss and average concentration of SO 2 . Numerical analysis of truck generated salt spray transport near bridges is processed in a study Lottes and Bojanowski (2013). This report documents work using CFD analysis to study the conditions and mechanisms that lead from the salt spray thrown from truck tires to salt water droplets reaching bridge girders. Computer simulations to study the transport, dispersion, and deposition of pollutant particles near the bridge are published in the Liu and Ahmadi (2005), where k- ε models of the Fluent software were used to simulate mean airflow conditions. A Lagrangian particle tracking model was used and the dispersion and deposition of particulate emissions from motor vehicle exhaust on the bridge was analyzed. The corresponding deposition rates on different surfaces were studied and the importance of wind turbulence and gravity on particle deposition was evaluated. In the paper Suto et al. (2017), a method combining a computational fluid dynamics model and a statistical procedure is proposed for the efficient estimation of the area-wide distributions of the cumulative amount of sea salt in the air, taking into account the local topography. The result was that the predicted amount of sea salt in the air decreases with increasing distance from the coast and varies with topography and onshore winds. In the article Hu et al. (2015) there was an investigation of the numerical simulation of spray induced by a simplified wheel model and a modified square-back model. In the simulation process, the phenomenon of breakup and coalescence of drops were considered. The relationship between the vehicle external flow structure and body soiling was discussed. The study Joung and Buie (2015) highlights new phenomena associated with droplets on porous media that could have implications for environmental aerosol formation research. Prevention of bridge degradation due to sea salt and the comparisons between the numerical and observed results are made in the article Obata et al. (2014). The paper Vargas Rivero et al. (2022) presents a real-time simulation of the effect of sprayed water on an automotive sensor. The simulation is based on physically measurable quantities, the sensor and the environment are simulated using the Blender and Cycles software tools. 2. Solution procedure The aim of this paper is numerical analysis of the transport of water mist sprayed from the road to the near and far surroundings by passing one truck in different wind directions. The possibility of comparing the numerical model with the ongoing real measurement in the road cut is used here. The passage of the car through the road cut is solved, see Fig. 1, the slope of the ground body is approximately 25°. The sensors are located at three distances from the axis of the communication, and in these places a numerical analysis was also evaluated for comparison.

Fig. 1. Cross-section of the road cut with the positions of the measuring points.