Publication detail

Influence of Second Viscosity on Pressure Pulsation

HIMR, D. HABÁN, V. FIALOVÁ, S.

Original Title

Influence of Second Viscosity on Pressure Pulsation

Type

journal article in Web of Science

Language

English

Original Abstract

A mathematical model of pulsating flow is proposed in the paper. The model includes more accurate description of energy dissipation, so it allows, for example, better stability analysis of water power plant control and more effective operation. Flow in a pipeline system is usually treated as a one-dimensional flow. This is also applied for more difficult cases of the Newtonian and non-Newtonian liquids simulations in the rigid or flexible pipes. Computational simulations of pressure pulsations in pipelines often predict lower damping than what the experimental results show. This discrepancy can be caused by neglecting one of the important damping mechanisms. The second viscosity describes the energy losses due to the compressibility of the liquid. Its existence and use in the computations specifies the real pulsations damping descriptions and predictions. A frequency dependent model of pressure pulsations including second viscosity is introduced. The second viscosity is determined from the system eigenvalue. The experiments were performed with water for low frequencies (from 0.1 to 1 kHz). This area is not fully covered by the current available research results.

Keywords

Second viscosity, damping, pressure pulsation, frequency domain

Authors

HIMR, D.; HABÁN, V.; FIALOVÁ, S.

Released

12. 12. 2019

Publisher

MDPI

ISBN

2076-3417

Periodical

Applied Sciences - Basel

Year of study

9

Number

24

State

Swiss Confederation

Pages from

1

Pages to

12

Pages count

12

URL

https://www.mdpi.com/2076-3417/9/24/5444

Full text in the Digital Library

http://hdl.handle.net/11012/184120

BibTex

@article{BUT160853,
  author="Daniel {Himr} and Vladimír {Habán} and Simona {Fialová}",
  title="Influence of Second Viscosity on Pressure Pulsation",
  journal="Applied Sciences - Basel",
  year="2019",
  volume="9",
  number="24",
  pages="1--12",
  doi="10.3390/app9245444",
  issn="2076-3417",
  url="https://www.mdpi.com/2076-3417/9/24/5444"
}