Capturing the dynamical transitions in the flow-field of a flapping foil using Immersed Boundary Method

Majumdar, Dipanjan; Bose, Chandan; Sarkar, Saswati

doi:10.1016/j.jfluidstructs.2020.102999

Cited by 25 publications

(39 citation statements)

References 53 publications

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“…It was also validated thoroughly in Majumdar et al. (2020 a ) by comparing the results of the present solver with those available in the literature, and also with the results obtained from a well-established ALE based OpenFOAM solver. The convergence test results relevant to the present study are presented next.…”

Section: Computational Detailsmentioning

confidence: 92%

“…Such interaction mechanisms were discussed in detail by Bose & Sarkar (2018) and Majumdar et al. (2020 a ).…”

Section: Role Of the Primary Lev On Flow Field Periodicitymentioning

confidence: 95%

“…A discrete forcing type immersed boundary method (IBM) based in-house flow solver (Majumdar et al. 2020 a ) is used in this study. In the present IBM technique, a ‘momentum forcing’ is applied at all the grid points inside the solid domain.…”

Section: Computational Detailsmentioning

confidence: 99%

“…However, a few recent studies have also highlighted interesting changes from periodicity to aperiodicity in the wake for different canonical flapping kinematics, e.g. pure plunging (Lewin & Haj-Hariri 2003; Badrinath, Bose & Sarkar 2017; Majumdar, Bose & Sarkar 2020 a ), pure pitching (Zaman, Young & Lai 2017) and combined pitching–plunging (Lentink et al. 2010; Bose & Sarkar 2018; Bose, Gupta & Sarkar 2021).…”

Section: Introductionmentioning

confidence: 99%

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Transition boundaries and an order-to-chaos map for the flow field past a flapping foil

2022

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The present study focuses on identifying dynamical transition boundaries and presents an order-to-chaos map for the unsteady flow field of a flapping foil in the low Reynolds number regime. The effect of an extensive parametric space, covering a large number of kinematic conditions, has been investigated. It is shown that the conventional non-dimensional parameters cannot effectively capture the changes in the flow field due to the variations in the relevant kinematic parameters and are unable to demarcate the dynamical transition boundaries. Two new non-dimensional measures – maximum effective angle of attack and a leading-edge amplitude-based Strouhal number – are proposed here, which can capture the physical effect of the parametric variations on the wake dynamics. The study proposes generalised transition boundaries and an order-to-chaos map through a transitional regime in terms of these two newly proposed parameters. Published data from the existing literature have also been tested to verify the proposed transition model. It is seen that despite the wide variety of the parametric combinations, the dynamical states from both the new and the published data corroborate well the proposed boundaries, giving credibility to the order-to-chaos map.

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Section: Computational Detailsmentioning

confidence: 92%

“…Such interaction mechanisms were discussed in detail by Bose & Sarkar (2018) and Majumdar et al. (2020 a ).…”

Section: Role Of the Primary Lev On Flow Field Periodicitymentioning

confidence: 95%

Section: Computational Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transition boundaries and an order-to-chaos map for the flow field past a flapping foil

2022

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“…where i u is the fluctuation velocity and i u is the average velocity. The features of transition [18] are randomness and irregularity. Let h U( x , )  be a neighborhood of point h…”

Section: Mathematical Analysis Of Transitionmentioning

confidence: 99%

Mathematical Principle Analysis of Transition Point Prediction

Peng

Zhang

Peng

et al. 2022

Advances in Transdisciplinary Engineering

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Transition is the basic phenomena of complex flow regime changes in fluid mechanics. So far, the axiomatic expression and rigorous mathematical description of transition and separation are important basic scientific problems, which are also of great significance to the development of Applied Science. This article obtaining the basic conditions and general conditions for transition through the excited state theory of flowfield, which is derivation based on the N-S equations, combined with Euler’s description point of view, applied tensor analysis and with the help of the basic principles of superposition states of quantum mechanics. The research of this paper provide a theoretical view for the study of turbulence mechanism.

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Massive Parallelisation and Performance Enhancement of an Immersed Boundary Method Based Unsteady Flow Solver

Sundar,

Majumdar,

Shah

et al. 2024

Lecture Notes in Mechanical Engineering

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Capturing the dynamical transitions in the flow-field of a flapping foil using Immersed Boundary Method

Cited by 25 publications

References 53 publications

Transition boundaries and an order-to-chaos map for the flow field past a flapping foil

Transition boundaries and an order-to-chaos map for the flow field past a flapping foil

Mathematical Principle Analysis of Transition Point Prediction

Massive Parallelisation and Performance Enhancement of an Immersed Boundary Method Based Unsteady Flow Solver

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