PSI - Issue 73

Ivan Kolos et al. / Procedia Structural Integrity 73 (2025) 58–65 Author name / Structural Integrity Procedia 00 (2025) 000 – 000

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Standard k- ε turbulent model was used to model wind flow. The discrete phase is modelled by the Euler-Lagrange approach.

Fig. 1. Cross section of the road. Dimensions in [m].

Fig. 2 shows a created computing domain based on the real geometry of the road. The domain is 300 m long, 60 m wide, 15.85 m high, and is divided into 3 zones: the preparation zone (150 m long), the analysis zone (90 m long) and the exit zone (60 m long). The length of the preparation zone allows for sufficient development of the particle cloud behind the vehicle, while the length of the analytical zone allows not only for the tracking of particles on some of the sampling planes but also for the evaluation of which part of the sampling zone the particles most frequently impact. The dimensions of the exit zone allow vehicles to leave the analytical zone without negatively affecting the movement of particles in the analytical zone and the monitoring of their capture when exiting the zone. Both vehicles are placed in a separate subdomain in a 669 m long box, which allows simulation of the movement of the vehicle using the sliding mesh technique. The distance between trucks is 66 m, which corresponds to the recommended minimum safety distance of 2 seconds between moving vehicles. The domain mesh consists of 860 thousand polyhedral cells. Cells in close vicinity of vehicle have diameters within range of 0.05 and 0.2 m, the maximum size of all other cells is 0.5 m. The trucks are modelled on a simplified geometry based on (Ardian, 2018). The length of each vehicle is 16 m, the width is 2.7 m, and the height is 4 m.