Publication detail
Bulk viscosity of water in acoustic modal analysis and experiment
KŮREČKA, J. HABÁN, V. HIMR, D.
Czech title
Druhá viskozita vody v akustické modální analýze a v experimentu
English title
Bulk viscosity of water in acoustic modal analysis and experiment
Type
conference paper
Language
en
Original abstract
Bulk viscosity is an important factor in the damping properties of fluid systems and exhibits frequency dependent behaviour. A comparison between modal analysis in ANSYS Acoustics, custom code and experimental data is presented in this paper. The measured system consists of closed ended water-filled steel pipes of different lengths. The influence of a pipe wall, flanges on both ends and longitudinal waves in the structural part were included in measurement evaluation. Therefore, the obtained values of sound speed and bulk viscosity are parameters of the fluid. A numerical simulation was carried out only using fluid volume in a range of bulk viscosity. Damping characteristics in this range were compared to measured values. The results show a significant influence of sound speed and subsequently, the use of sound speed value regressed from experimental data yields a better fit between the measurement and the computation.
English abstract
Bulk viscosity is an important factor in the damping properties of fluid systems and exhibits frequency dependent behaviour. A comparison between modal analysis in ANSYS Acoustics, custom code and experimental data is presented in this paper. The measured system consists of closed ended water-filled steel pipes of different lengths. The influence of a pipe wall, flanges on both ends and longitudinal waves in the structural part were included in measurement evaluation. Therefore, the obtained values of sound speed and bulk viscosity are parameters of the fluid. A numerical simulation was carried out only using fluid volume in a range of bulk viscosity. Damping characteristics in this range were compared to measured values. The results show a significant influence of sound speed and subsequently, the use of sound speed value regressed from experimental data yields a better fit between the measurement and the computation.
Keywords in English
bulk viscosity, fluid acoustics
Released
04.06.2018
Publisher
EDP Sciences
ISSN
2100-014X
Book
EPJ Web of Conferences
Volume
180
Number
2018
Pages from–to
1–6
Pages count
6
BIBTEX
@inproceedings{BUT150102,
author="Jan {Kůrečka} and Vladimír {Habán} and Daniel {Himr},
title="Bulk viscosity of water in acoustic modal analysis and experiment",
booktitle="EPJ Web of Conferences",
year="2018",
volume="180",
number="2018",
month="June",
pages="1--6",
publisher="EDP Sciences",
issn="2100-014X"
}