Numerical investigation of Lagrangian coherent structures in steady rotation vortex shedding control
Joint Authors
Shehzad, Ihsan
al-Rahman, Tauseef
Suhayl, Amir
Ambreen, Tehmina
Anwar, Muhammad Arsalan
Source
Journal of Engineering Research
Issue
Vol. 10, Issue 1 B (31 Mar. 2022), pp.153-166, 14 p.
Publisher
Kuwait University Academic Publication Council
Publication Date
2022-03-31
Country of Publication
Kuwait
No. of Pages
14
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
n this paper, vortex shedding and suppression are numerically investigated as autonomous and nonautonomous dynamical systems, respectively.
Lagrangian coherent structures (LCSs) are used as a numerical tool to analyze these systems.
These structures are ridges of finite time Lyapunov exponent (FTLE), which act as material surfaces that are transport barriers within the flow.
Initially, the utility of LCSs is explored for revealing the coherent structures of these systems.
Finally, an active flow control method, steady rotation, is applied to the nonautonomous dynamical system with different speed ratios to mitigate vortex shedding magnitude.
This will eventually turn the system into an autonomous system.
Fixed saddle points, separation profiles essentially as unstable time variant manifolds attached to cylinder wall, and evolution of other unstable manifolds with variant speed ratios are analyzed with reference to LCSs.
It is revealed that speed ratio of 2.1 fully suppresses the von Karman vortex street at Reynolds number of 100 and system turns into an autonomous dynamical system with fixed saddle points and time-invariant manifolds.
American Psychological Association (APA)
Shehzad, Ihsan& al-Rahman, Tauseef& Suhayl, Amir& Ambreen, Tehmina& Anwar, Muhammad Arsalan. 2022. Numerical investigation of Lagrangian coherent structures in steady rotation vortex shedding control. Journal of Engineering Research،Vol. 10, no. 1 B, pp.153-166.
https://search.emarefa.net/detail/BIM-1494625
Modern Language Association (MLA)
Shehzad, Ihsan…[et al.]. Numerical investigation of Lagrangian coherent structures in steady rotation vortex shedding control. Journal of Engineering Research Vol. 10, no. 1 B (Mar. 2022), pp.153-166.
https://search.emarefa.net/detail/BIM-1494625
American Medical Association (AMA)
Shehzad, Ihsan& al-Rahman, Tauseef& Suhayl, Amir& Ambreen, Tehmina& Anwar, Muhammad Arsalan. Numerical investigation of Lagrangian coherent structures in steady rotation vortex shedding control. Journal of Engineering Research. 2022. Vol. 10, no. 1 B, pp.153-166.
https://search.emarefa.net/detail/BIM-1494625
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 165-166
Record ID
BIM-1494625