Self-excited oscillations of three-dimensional collapsible tubes conveying both laminar and turbulent flows DOI Creative Commons
Qiuxiang Huang, Xueyu Ji, Jingtao Ma

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

This study investigates self-excited oscillations of three-dimensional collapsible tubes conveying both laminar and turbulent flows, using an immersed boundary-lattice Boltzmann method. The effects Reynolds number (Re) on these are explored, revealing that at Re = 200, periodic vortex shedding downstream the tube throat induces small-amplitude, quasi-periodic oscillations. Notably, stress concentrations near end elastic lead to formation two regions wall thickening, which may predispose fatigue failure. At higher flow conditions (Re 1000), bifurcation occurs, resulting in large-amplitude, These similarly driven by shedding, imparts perturbations onto wall. Additionally, analysis monitoring points within rigid reveals small secondary pressure streamwise velocity. attributed merging jets their interactions tube.

Language: Английский

Synergistic effects of vortex generators and elastic walls on enhancement of heat transfer in microchannels DOI

Farzad Havasi,

Seyyed Hossein Hosseini,

Sajjad Ahangar Zonouzi

et al.

International Communications in Heat and Mass Transfer, Journal Year: 2025, Volume and Issue: 164, P. 108855 - 108855

Published: March 13, 2025

Language: Английский

Citations

0
Self-excited oscillations of three-dimensional collapsible tubes conveying both laminar and turbulent flows DOI Creative Commons
Qiuxiang Huang, Xueyu Ji, Jingtao Ma

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

This study investigates self-excited oscillations of three-dimensional collapsible tubes conveying both laminar and turbulent flows, using an immersed boundary-lattice Boltzmann method. The effects Reynolds number (Re) on these are explored, revealing that at Re = 200, periodic vortex shedding downstream the tube throat induces small-amplitude, quasi-periodic oscillations. Notably, stress concentrations near end elastic lead to formation two regions wall thickening, which may predispose fatigue failure. At higher flow conditions (Re 1000), bifurcation occurs, resulting in large-amplitude, These similarly driven by shedding, imparts perturbations onto wall. Additionally, analysis monitoring points within rigid reveals small secondary pressure streamwise velocity. attributed merging jets their interactions tube.

Language: Английский

Citations

1