Flow of Oil and Water through the Nozzle and Cavitation

Today, the correct understanding of the issue of oil and water cavitation is important due to the growing demands on working conditions in hydraulic systems (pressure and flow rate). This article deals with the measurement and subsequent mathematical modeling of cavitation in a convergent-divergent...

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Autores principales:	Jana Jablonská, Milada Kozubková, Marian Bojko
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	oil cavitation water cavitation mathematical modeling CFD multiphase flow Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/f825831e608445e98c24e5442034aebf
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spelling	oai:doaj.org-article:f825831e608445e98c24e5442034aebf2021-11-25T18:50:35ZFlow of Oil and Water through the Nozzle and Cavitation10.3390/pr91119362227-9717https://doaj.org/article/f825831e608445e98c24e5442034aebf2021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1936https://doaj.org/toc/2227-9717Today, the correct understanding of the issue of oil and water cavitation is important due to the growing demands on working conditions in hydraulic systems (pressure and flow rate). This article deals with the measurement and subsequent mathematical modeling of cavitation in a convergent-divergent nozzle of circular cross-section. Cavitation depends on the physical properties of the flowing medium as a function of temperature. Usually, cavitation in water is defined by a two-phase flow of water and vapor, but the air contained in the water significantly affects cavitation. There is usually no vapor cavitation in the oil. Far more often, cavitation in oil is caused by the air it contains. For comparison, cavitation in water and oil was generated in experiments with an identical nozzle. The measurement was used to define boundary conditions in mathematical models and to verify simulations. The problem of cavitation was solved by three variants of multiphase flow, single-phase flow (water, oil), two-phase flow (water–vapor, oil–air) and three-phase flow (water–vapor–air, oil–vapor–air). A turbulent model with cavitation was used for all variants. The verification of simulations shows that for water cavitation it is necessary to use a three-phase model (water, vapor, air) and for oil cavitation a two-phase model (oil, air) is sufficient. The measurement results confirm the importance of the air phase in modeling cavitation in both water and oil.Jana JablonskáMilada KozubkováMarian BojkoMDPI AGarticleoil cavitationwater cavitationmathematical modelingCFDmultiphase flowChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1936, p 1936 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	oil cavitation water cavitation mathematical modeling CFD multiphase flow Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	oil cavitation water cavitation mathematical modeling CFD multiphase flow Chemical technology TP1-1185 Chemistry QD1-999 Jana Jablonská Milada Kozubková Marian Bojko Flow of Oil and Water through the Nozzle and Cavitation
description	Today, the correct understanding of the issue of oil and water cavitation is important due to the growing demands on working conditions in hydraulic systems (pressure and flow rate). This article deals with the measurement and subsequent mathematical modeling of cavitation in a convergent-divergent nozzle of circular cross-section. Cavitation depends on the physical properties of the flowing medium as a function of temperature. Usually, cavitation in water is defined by a two-phase flow of water and vapor, but the air contained in the water significantly affects cavitation. There is usually no vapor cavitation in the oil. Far more often, cavitation in oil is caused by the air it contains. For comparison, cavitation in water and oil was generated in experiments with an identical nozzle. The measurement was used to define boundary conditions in mathematical models and to verify simulations. The problem of cavitation was solved by three variants of multiphase flow, single-phase flow (water, oil), two-phase flow (water–vapor, oil–air) and three-phase flow (water–vapor–air, oil–vapor–air). A turbulent model with cavitation was used for all variants. The verification of simulations shows that for water cavitation it is necessary to use a three-phase model (water, vapor, air) and for oil cavitation a two-phase model (oil, air) is sufficient. The measurement results confirm the importance of the air phase in modeling cavitation in both water and oil.
format	article
author	Jana Jablonská Milada Kozubková Marian Bojko
author_facet	Jana Jablonská Milada Kozubková Marian Bojko
author_sort	Jana Jablonská
title	Flow of Oil and Water through the Nozzle and Cavitation
title_short	Flow of Oil and Water through the Nozzle and Cavitation
title_full	Flow of Oil and Water through the Nozzle and Cavitation
title_fullStr	Flow of Oil and Water through the Nozzle and Cavitation
title_full_unstemmed	Flow of Oil and Water through the Nozzle and Cavitation
title_sort	flow of oil and water through the nozzle and cavitation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f825831e608445e98c24e5442034aebf
work_keys_str_mv	AT janajablonska flowofoilandwaterthroughthenozzleandcavitation AT miladakozubkova flowofoilandwaterthroughthenozzleandcavitation AT marianbojko flowofoilandwaterthroughthenozzleandcavitation
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Flow of Oil and Water through the Nozzle and Cavitation

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