Přístupnostní navigace
E-application
Search Search Close
Publication detail
ELCNER, J. LÍZAL, F. JÍCHA, M.
Original Title
Comparison of turbulent models in the case of a constricted tube
Type
conference paper
Language
English
Original Abstract
The validation of a proper solution is an indispensable phase of every numerical simulation. Nowadays, many turbulent models are available, whose application leads to slightly different solution of flow behaviour depending on the boundary conditions of a specific problem. It is essential to select the proper turbulence model appropriate for the given situation. The aim of this study is to select the most suitable two-equation eddy-viscosity model, which can be further used during calculations of airflow in human airways. For this purpose, geometry of a constricted tube with well-documented experimental measurements was chosen. The flow in the constricted tube was calculated using Spallart-Almaras, k-omega, k-epsilon and SST model approach using commercial software. The outcome of the comparison is a choice of the suitable model which is capable of simulating the transition of the boundary layer from laminar to turbulent flow. This transition typically arises in the upper part of the respiratory system, where the airways are constricted, specifically in the area, where the oral cavity continues through the glottis to trachea. The simulations were performed in a commercial solver Star-CCM+.
Keywords
CFD; Comparison; Constricted tube; Flow
Authors
ELCNER, J.; LÍZAL, F.; JÍCHA, M.
Released
15. 11. 2016
Publisher
EDP Sciences
ISBN
2100-014X
Periodical
EPJ Web of Conferences
Year of study
143
State
French Republic
Pages from
1
Pages to
4
Pages count
URL
https://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02020/epjconf_efm2017_02020.html
Full text in the Digital Library
http://hdl.handle.net/11012/70125
BibTex
@inproceedings{BUT131514, author="Jakub {Elcner} and František {Lízal} and Miroslav {Jícha}", title="Comparison of turbulent models in the case of a constricted tube", booktitle="EPJ Web of Conferences", year="2016", journal="EPJ Web of Conferences", volume="143", number="1", pages="1--4", publisher="EDP Sciences", doi="10.1051/epjconf/201714302020", issn="2100-014X", url="https://www.epj-conferences.org/articles/epjconf/abs/2017/12/epjconf_efm2017_02020/epjconf_efm2017_02020.html" }