In this study, we investigate dynamic behaviour and the linear stability of collapsible channel flows under various physical parameters and boundary conditions. Two approaches are adopted in the study: one is a fully coupled numerical solver for solving fluid-structure governing equations; the other is an eigenvalue solver which is used for linear stability analysis. We focus on the situation where the inlet pressure drop (relative to the outlet) is prescribed. Static divergence and mode-1 instabilities are found in addition to higher modes, which can co-exist in a structure which is quite different from the cascade structure identified with the flow rate inlet boundary condition. Mode transfer from lower to higher modes is also discovered as the stiffness of the elastic wall is reduced. Finally, our results are compared with the asymptotic prediction for high Reynolds number and tension region.
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ASME 2009 Pressure Vessels and Piping Conference
July 26–30, 2009
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4367-3
PROCEEDINGS PAPER
Stability and Pressure Boundary Conditions in the Collapsible Channel Flows
H. F. Liu
University of Glasgow, Glasgow, UK
X. Y. Luo
University of Glasgow, Glasgow, UK
Z. X. Cai
Tianjin University, Tianjin, China
Paper No:
PVP2009-77767, pp. 409-416; 8 pages
Published Online:
July 9, 2010
Citation
Liu, HF, Luo, XY, & Cai, ZX. "Stability and Pressure Boundary Conditions in the Collapsible Channel Flows." Proceedings of the ASME 2009 Pressure Vessels and Piping Conference. Volume 4: Fluid-Structure Interaction. Prague, Czech Republic. July 26–30, 2009. pp. 409-416. ASME. https://doi.org/10.1115/PVP2009-77767
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