Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer

Kean Lee Kang; K. S. Yeo

doi:10.1142/9789814635165_0041

Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The wavepacket is a model that bears close resemblance to naturally-occurring laminar turbulent transition processes in a boundary layer, but its large number of constituent spectral modes presents a challenge during analysis of the results. In this work, we leverage the extensive flow data available from direct numerical simulations (DNS) to perform a three-dimensional (3D) discrete Fourier transform of a wavepacket in order to investigate the most energetic modes in the flow. Through windowing, it is possible to isolate the wavepacket at different stages of its development, and build up an overall picture of its transition. Furthermore, an inverse transform is applied to subsets of the full spectrum, and this provides insight into the physical structure of its key components.

Original language	English
Title of host publication	Advances in computation, modeling and control of transitional and turbulent flows
Editors	Tapan K. Sengupta, Sanjiva K. Lele, Katepalli R. Sreenivasan, Peter A. Davidson
Place of Publication	New Jersey
Publisher	World Scientific Publishing Co. Pte Ltd
Pages	416-424
Number of pages	9
ISBN (Electronic)	9789814635172
ISBN (Print)	9789814635158
DOIs	https://doi.org/10.1142/9789814635165_0041
Publication status	Published - 2 Feb 2016
Externally published	Yes
Event	IUTAM Symposium on Advances in Computation, Modelling and Control of Transitional and Turbulent Flows - Hotel Marriott-Goa, Goa, India Duration: 15 Dec 2014 → 18 Dec 2014 https://iutam.org/event/iutam-symposium-on-advances-in-computation-modelling-and-control-of-transitional-and-turbulent-flows/

Conference

Conference	IUTAM Symposium on Advances in Computation, Modelling and Control of Transitional and Turbulent Flows
Country	India
City	Goa
Period	15/12/14 → 18/12/14
Internet address	https://iutam.org/event/iutam-symposium-on-advances-in-computation-modelling-and-control-of-transitional-and-turbulent-flows/

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Profiles

Kean Lee Kang

k520063@abertay.ac.uk

SDI - Games Technology & Mathematics - Lecturer

Person: Academic

Cite this

Kang, K. L., & Yeo, K. S. (2016). Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer. In T. K. Sengupta, S. K. Lele, K. R. Sreenivasan, & P. A. Davidson (Eds.), Advances in computation, modeling and control of transitional and turbulent flows (pp. 416-424). World Scientific Publishing Co. Pte Ltd. https://doi.org/10.1142/9789814635165_0041

Kang, Kean Lee ; Yeo, K. S. / Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer. Advances in computation, modeling and control of transitional and turbulent flows. editor / Tapan K. Sengupta ; Sanjiva K. Lele ; Katepalli R. Sreenivasan ; Peter A. Davidson. New Jersey : World Scientific Publishing Co. Pte Ltd, 2016. pp. 416-424

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title = "Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer",

abstract = "The wavepacket is a model that bears close resemblance to naturally-occurring laminar turbulent transition processes in a boundary layer, but its large number of constituent spectral modes presents a challenge during analysis of the results. In this work, we leverage the extensive flow data available from direct numerical simulations (DNS) to perform a three-dimensional (3D) discrete Fourier transform of a wavepacket in order to investigate the most energetic modes in the flow. Through windowing, it is possible to isolate the wavepacket at different stages of its development, and build up an overall picture of its transition. Furthermore, an inverse transform is applied to subsets of the full spectrum, and this provides insight into the physical structure of its key components.",

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note = "IUTAM Symposium on Advances in Computation, Modelling and Control of Transitional and Turbulent Flows ; Conference date: 15-12-2014 Through 18-12-2014",

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Kang, KL & Yeo, KS 2016, Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer. in TK Sengupta, SK Lele, KR Sreenivasan & PA Davidson (eds), Advances in computation, modeling and control of transitional and turbulent flows. World Scientific Publishing Co. Pte Ltd, New Jersey, pp. 416-424, IUTAM Symposium on Advances in Computation, Modelling and Control of Transitional and Turbulent Flows, Goa, India, 15/12/14. https://doi.org/10.1142/9789814635165_0041

Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer. / Kang, Kean Lee; Yeo, K. S.

Advances in computation, modeling and control of transitional and turbulent flows. ed. / Tapan K. Sengupta; Sanjiva K. Lele; Katepalli R. Sreenivasan; Peter A. Davidson. New Jersey : World Scientific Publishing Co. Pte Ltd, 2016. p. 416-424.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Yeo, K. S.

PY - 2016/2/2

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N2 - The wavepacket is a model that bears close resemblance to naturally-occurring laminar turbulent transition processes in a boundary layer, but its large number of constituent spectral modes presents a challenge during analysis of the results. In this work, we leverage the extensive flow data available from direct numerical simulations (DNS) to perform a three-dimensional (3D) discrete Fourier transform of a wavepacket in order to investigate the most energetic modes in the flow. Through windowing, it is possible to isolate the wavepacket at different stages of its development, and build up an overall picture of its transition. Furthermore, an inverse transform is applied to subsets of the full spectrum, and this provides insight into the physical structure of its key components.

AB - The wavepacket is a model that bears close resemblance to naturally-occurring laminar turbulent transition processes in a boundary layer, but its large number of constituent spectral modes presents a challenge during analysis of the results. In this work, we leverage the extensive flow data available from direct numerical simulations (DNS) to perform a three-dimensional (3D) discrete Fourier transform of a wavepacket in order to investigate the most energetic modes in the flow. Through windowing, it is possible to isolate the wavepacket at different stages of its development, and build up an overall picture of its transition. Furthermore, an inverse transform is applied to subsets of the full spectrum, and this provides insight into the physical structure of its key components.

U2 - 10.1142/9789814635165_0041

DO - 10.1142/9789814635165_0041

M3 - Conference contribution

SN - 9789814635158

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BT - Advances in computation, modeling and control of transitional and turbulent flows

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A2 - Lele, Sanjiva K.

A2 - Sreenivasan, Katepalli R.

A2 - Davidson, Peter A.

PB - World Scientific Publishing Co. Pte Ltd

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T2 - IUTAM Symposium on Advances in Computation, Modelling and Control of Transitional and Turbulent Flows

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Kang KL, Yeo KS. Forward and inverse 3D Fourier transforms of a DNS wavepacket evolving in a Blasius boundary layer. In Sengupta TK, Lele SK, Sreenivasan KR, Davidson PA, editors, Advances in computation, modeling and control of transitional and turbulent flows. New Jersey: World Scientific Publishing Co. Pte Ltd. 2016. p. 416-424 https://doi.org/10.1142/9789814635165_0041