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ELCNER, J. LÍZAL, F. JEDELSKÝ, J. TUHOVČÁK, J. JÍCHA, M.
Original Title
Laminar-turbulent transition in a constricted tube: Comparison of Reynolds-averaged Navier–Stokes turbulence models and large eddy simulation with experiments
Type
journal article in Web of Science
Language
English
Original Abstract
Constricted tubes appear in many engineering as well as biological systems such as blood vessels or pulmonary airways. The aim of this article is to test the ability of different turbulence models to predict the flow field and deposition of particles in a constricted tube. The constricted geometry of Ahmed and Giddens was employed to compare various numerical approaches. Two large eddy simulations and several Reynolds-averaged Navier-Stokes models were used for calculations using the Star-CCM+ commercial solver. The performance of these models was compared with the experiments and other published studies. For selected turbulence models, deposition of particles with different Stokes numbers using Lagrangian multiphase model was enabled. The results show that large eddy simulation best predicts the transition from laminar to turbulent flow in terms of mean axial velocity, and similarly does also standard low-Reynolds k-epsilon model. The comparison of deposition fractions shows substantial differences among the models, especially for the smallest particles. It was demonstrated that even a simple stenosed smooth tube is a very intricate problem for the present computational fluid dynamics models; therefore, to get reliable results, numerical models need to be validated for the same geometry and similar conditions.
Keywords
Computational fluid mechanics, turbulence models, Reynolds-averaged Navier–Stokes, large eddy simulation, constricted tube, stenosis, transition, laminar to turbulent, numerical simulations, particle deposition
Authors
ELCNER, J.; LÍZAL, F.; JEDELSKÝ, J.; TUHOVČÁK, J.; JÍCHA, M.
Released
27. 5. 2019
Publisher
SAGE Journals
ISBN
1687-8140
Periodical
Advances in Mechanical Engineering
Year of study
11
Number
5
State
United Kingdom of Great Britain and Northern Ireland
Pages from
1
Pages to
17
Pages count
URL
https://doi.org/10.1177/1687814019852261
Full text in the Digital Library
http://hdl.handle.net/11012/180473
BibTex
@article{BUT157111, author="Jakub {Elcner} and František {Lízal} and Jan {Jedelský} and Ján {Tuhovčák} and Miroslav {Jícha}", title="Laminar-turbulent transition in a constricted tube: Comparison of Reynolds-averaged Navier–Stokes turbulence models and large eddy simulation with experiments", journal="Advances in Mechanical Engineering", year="2019", volume="11", number="5", pages="1--17", doi="10.1177/1687814019852261", issn="1687-8140", url="https://doi.org/10.1177/1687814019852261" }