20.500.12556/DKUM-98916 Investigation of simultaneous cavitation and particle erosion in venturi channels with different divergent angles using CFD simulations and soft paint method experiments Flow in fluid machinery can include multiphase phenomena such as cavitation due to energy exchange between the machinery and flow of a liquid, which, in turn, produces local drops in pressure and, therefore, evaporation. When vapor structures are subjected to increased pressure, they collapse during the process of condensation. These collapses are driven by high ambient pressure and can, over time, induce damage to the fluid machinery solid walls—a process termed cavitation erosion. In addition, fluid machinery such as water turbines and pumps often operate in water that is not pure. In this water, solid particles can be present, for example, river sediment, which can also produce erosion. In the past, these causes of erosion were mostly investigated separately; however, as they sometimes occur simultaneously, studies that replicate these conditions are necessary. In the present work, we investigated the erosion of a Venturi channel surface with several different divergent angles using CFD simulations, which were validated experimentally using the soft paint method. Results showing the cavitation and particle erosion were obtained for different flow conditions (specifically with different vortical structures) that are expected to occur in fluid machinery. The results suggest that cavitation modifies the flow field in a manner that affects particle-induced erosion, leading to different macroscopic erosion patterns. erosion cavitation hydraulic syistems computational fluid dynamics Venturi channel divergent angle soft paint multiphase flow erozia kavitacija hiravlični sistemi računalniška dinamika tekočin Venturijev kanal divergentni kot mehka barva večfazni tok true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/2227-9717/14/14/2295 Članek v reviji 2026-07-17 09:35:35 2026-07-17 09:35:36 2026-07-18 03:13:03 0000-00-00 00:00:00 2026 0 0 25 str. iss. 14, [article no.] 2295 Vol. 14 July 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-05-28 2026-07-09 2026-07-14 532:621.22 285188611 10.3390/pr14142295 2227-9717 https://www.mdpi.com/2227-9717/14/14/2295 1 1a773c50-81b2-11f1-a6d3-00155d580e34 https://dk.um.si/Dokument.php?lang=slv&id=208352 processes-14-02295-v2.pdf processes-14-02295-v2.pdf 1 DE4986535468FBFB1D6DF9F7A8FA1B00 6635c3fc6207f27a4bb48085309ab40875767dca3daca1759a9ee0ba60d01aee c5a8186e-81b2-11f1-a6d3-00155d580e34 https://dk.um.si/Dokument.php?lang=slv&id=208353 Fakulteta za strojništvo 0 0 0