PSI - Issue 63

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

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Fig. 8. Sampling zone 5 in 3D diagram – distribution of droplets. (a) Variant 1, (b) Variant 2, (c) Variant 3, (d) Variant 4.

The total amount of captured droplets in the entire length of the 90 m analytical zone are presented in Table 2, which shows the number of droplets in kg captured on individual sampling zones in the analytic zone for the solved wind direction variants.

Table 2. Amount of droplets in kg on sampling zones at distances of 5, 9 and 13 m from the road axis. Amount of droplets [kg] Sampling zone 5 Sampling zone 9 Sampling zone 13 Variant 1 2.713 0.189 0 Variant 2 2.629 0 0 Variant 3 0.224 0.019 0 Variant 4 0.004 0.006 0.012

The values displayed in the Table 2 show a trend that the number of droplets decreases with the increasing distance of the sampling zones from the roadway axis, except for the last variant 4 (the left wind flow, in the direction of the vehicle). In this variant, the fewest droplets were captured in the nearest sampling zone 5, but the particles tended to rise upwards and therefore also reached the most distant sampling zone 13. 4. Conclusions The article dealt with simulations of a moving vehicle, when sliding mesh approach was used for modelling the movement of the vehicle. The goal was to evaluate the distribution and total amount of droplets that are sprayed from a moving truck to different distances in a road cut. Four variants of the wind flow were solved. Modeling was done in ANSYS Fluent software and standard k- ε turbulent model was used to model wind flow. Discrete phase was modeled by Euler-Lagrange approach. As expected, the most droplets landed on the nearest monitored sampling zone at a distance of 5 m from the axes of the road, when the wind flowed from the side of the sampling zone (variants 1 and 2). An order of magnitude fewer