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VACULA, J. NOVOTNÝ, P.
Original Title
Critical pressure in liquids due to dynamic choking
Type
journal article in Web of Science
Language
English
Original Abstract
The existence of a critical pressure ratio due to gas-dynamic choking is well known for an ideal gas. It is reasonable to assume that liquids whose compressibility is defined by the bulk modulus also have a critical pressure ratio. The problem discussed here is a fundamental one because it deals with the basic principles of the compressible flow of liquids. It has been shown that even though an ideal gas with a constant heat capacity ratio value has a critical pressure ratio, liquid with a constant bulk modulus value experiences a critical pressure difference. As the outlet pressure gradually decreases, the liquid reaches the local speed of sound, and further reduction of this pressure does not lead to an increase in mass flow. This phenomenon occurs in liquids without considering the change from a liquid to a gaseous phase. Behavior is confirmed analytically for different bulk modulus models, and for a constant bulk modulus value, the phenomenon is verified by numerical simulation using computational fluid dynamics. The conclusions published in this work point to striking analogies between the behavior of liquids and ideal gas. The equations governing the motion of liquids derived in this work, thus complete the fundamental description of the critical flow of fluids.
Keywords
dynamic choking; liquid; compressible flow
Authors
VACULA, J.; NOVOTNÝ, P.
Released
21. 4. 2022
Publisher
AMER PHYSICAL SOC
Location
COLLEGE PK
ISBN
2470-0045
Periodical
PHYSICAL REVIEW E
Year of study
105
Number
4
State
United States of America
Pages from
1
Pages to
10
Pages count
URL
https://journals.aps.org/pre/abstract/10.1103/PhysRevE.105.045107
BibTex
@article{BUT178221, author="Jiří {Vacula} and Pavel {Novotný}", title="Critical pressure in liquids due to dynamic choking", journal="PHYSICAL REVIEW E", year="2022", volume="105", number="4", pages="1--10", doi="10.1103/PhysRevE.105.045107", issn="2470-0045", url="https://journals.aps.org/pre/abstract/10.1103/PhysRevE.105.045107" }