Construction of a model of the impact interaction between a water jet and a vertical wall

Authors

DOI:

https://doi.org/10.15587/1729-4061.2026.357891

Keywords:

two-phase jet, drop zone, fire hydrant, droplet-vertical wall interaction

Abstract

This work investigates the process of interaction between the droplet phase of a two-phase flow "droplet-air" and a vertical wall; the subject of this study is the trajectory of motion and characteristics of water droplets in a two-phase flow when they collide with a vertical surface. The task addressed is to reduce water losses when it is supplied by a fire hose to a vertical wall while splashing upon impact.

The droplet motion was modeled within the framework of the Lagrangian approach, in which the dynamics of each droplet were described by the equations of motion in three-dimensional space taking into account the forces of aerodynamic resistance and gravity. To take into account the stochastic nature of droplet sizes and transverse velocity components, 105 trajectories with diameter distribution according to the Rosin-Ramler law were simulated.

It was established that the density distribution of a water particle reaching the vertical wall has a unimodal character. With increasing water supply pressure, the fraction of water reaching the wall increases significantly, and the maximum of the distribution density becomes more pronounced. In particular, when water is supplied by a fire hose with a nozzle diameter of 19 mm at an angle of 35° from a distance of 25 m, the fraction of water that does not reach the wall decreases from 49% at a pressure of 40 m to 8% at a pressure of 70 m.

It is shown that the interaction of droplets with the wall occurs mainly under the spreading and splashing modes, while the deposition and reflection modes account for less than 1%. With increasing pressure, the fraction of spreading droplets decreases, and the fraction of splashing droplets increases. Under the splashing mode, on average, about 50% of the drop mass is lost. As a result of taking splashing into account, the water distribution density along the vertical wall changes from unimodal to bimodal, where the second maximum corresponds to the zone of predominant droplet spreading

Author Biographies

Oleksii Basmanov, National University of Civil Protection of Ukraine

Doctor of Technical Sciences, Professor, Leading Researcher

Scientific and Testing Department of fire Protection and Fire Extinguishing Systems Research of the Scientific and Research Center of Research and Testing of the Institute of Scientific Research on Civil Protection

Volodymyr Oliinyk, National University of Civil Protection of Ukraine

Doctor of Technical Sciences, Professor, Head of Department

Department of Automatic Safety Systems and Electrical Installations

Oleksandr Telelym, The Central Research Institute of the Armed Forces of Ukraine

Researcher

Dmytro Chalyy, Department of Civil Protection and Preventive Activities of the Main Directorate of the State Emergency Service of Ukraine in Lviv Region

Leading Specialist

Iryna Chala, Department of Civil Protection and Preventive Activities of the Main Directorate of the State Emergency Service of Ukraine in Lviv Region

Leading Inspector of the Sector for Organization of Security Measures for Critical Infrastructure

Vasyl Maliarchuk, National University "Kyiv Aviation Institute"

Associate Professor

Department of Computer Systems and Networks

Anastasiia Hryshchenko, National University of Civil Protection of Ukraine

Adjunct

Artem Huz, National University of Civil Protection of Ukraine

Adjunct

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Construction of a model of the impact interaction between a water jet and a vertical wall

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Published

2026-04-28

How to Cite

Basmanov, O., Oliinyk, V., Telelym, O., Chalyy, D., Chala, I., Maliarchuk, V., Hryshchenko, A., & Huz, A. (2026). Construction of a model of the impact interaction between a water jet and a vertical wall. Eastern-European Journal of Enterprise Technologies, 2(10 (140), 32–39. https://doi.org/10.15587/1729-4061.2026.357891

Issue

Vol. 2 No. 10 (140) (2026): Ecology

Section

Ecology

License

Copyright (c) 2026 Oleksii Basmanov, Volodymyr Oliinyk, Oleksandr Telelym, Dmytro Chalyy, Iryna Chala, Vasyl Maliarchuk, Anastasiia Hryshchenko, Artem Huz

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