A Comparison of Turbulence Generated by 3DS Sparse Grids with Different Blockage Ratios and Different Co-frame Arrangements

M. Syed Usama; Nadeem A. Malik

doi:10.1007/978-3-030-63591-6_30

A Comparison of Turbulence Generated by 3DS Sparse Grids with Different Blockage Ratios and Different Co-frame Arrangements

M. Syed Usama, Nadeem A. Malik

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

Abstract

A new type of grid turbulence generator, the 3D sparse grid (3DS), is a co-planar arrangement of co-frames each containing a different length scale of grid elements [Malik, N. A. US Patent No. US 9,599,269 B2 (2017)] and possessing a much bigger parameter space than the flat 2D fractal square grid (2DF). Using DNS we compare the characteristics of the turbulence (mean flow, turbulence intensity, energy spectrum) generated by different types of 3DS grids. The peak intensities generated by 3DS can exceed the peaks generated by the 2DF by 80%; we observe that a 3DS with blockage ratio 24% produces turbulence similar to the 2DF with blockage ratio 32% implying lower energy input for the same turbulence.

Original language	English (US)
Title of host publication	Springer Proceedings in Mathematics & Statistics
Publisher	Springer International Publishing
Pages	325-334
Number of pages	10
ISBN (Print)	9783030635909
DOIs	https://doi.org/10.1007/978-3-030-63591-6_30
State	Published - Aug 30 2021
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-10-07
Acknowledgements: The authors acknowledge the support from King Abdullah University of Science and Technology (KAUST) for making available the High Performance Computing facility Shaheen 2 for this project.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1007/978-3-030-63591-6_30

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title = "A Comparison of Turbulence Generated by 3DS Sparse Grids with Different Blockage Ratios and Different Co-frame Arrangements",

abstract = "A new type of grid turbulence generator, the 3D sparse grid (3DS), is a co-planar arrangement of co-frames each containing a different length scale of grid elements [Malik, N. A. US Patent No. US 9,599,269 B2 (2017)] and possessing a much bigger parameter space than the flat 2D fractal square grid (2DF). Using DNS we compare the characteristics of the turbulence (mean flow, turbulence intensity, energy spectrum) generated by different types of 3DS grids. The peak intensities generated by 3DS can exceed the peaks generated by the 2DF by 80%; we observe that a 3DS with blockage ratio 24% produces turbulence similar to the 2DF with blockage ratio 32% implying lower energy input for the same turbulence.",

author = "Usama, {M. Syed} and Malik, {Nadeem A.}",

note = "KAUST Repository Item: Exported on 2021-10-07 Acknowledgements: The authors acknowledge the support from King Abdullah University of Science and Technology (KAUST) for making available the High Performance Computing facility Shaheen 2 for this project. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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doi = "10.1007/978-3-030-63591-6_30",

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N1 - KAUST Repository Item: Exported on 2021-10-07 Acknowledgements: The authors acknowledge the support from King Abdullah University of Science and Technology (KAUST) for making available the High Performance Computing facility Shaheen 2 for this project. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2021/8/30

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N2 - A new type of grid turbulence generator, the 3D sparse grid (3DS), is a co-planar arrangement of co-frames each containing a different length scale of grid elements [Malik, N. A. US Patent No. US 9,599,269 B2 (2017)] and possessing a much bigger parameter space than the flat 2D fractal square grid (2DF). Using DNS we compare the characteristics of the turbulence (mean flow, turbulence intensity, energy spectrum) generated by different types of 3DS grids. The peak intensities generated by 3DS can exceed the peaks generated by the 2DF by 80%; we observe that a 3DS with blockage ratio 24% produces turbulence similar to the 2DF with blockage ratio 32% implying lower energy input for the same turbulence.

AB - A new type of grid turbulence generator, the 3D sparse grid (3DS), is a co-planar arrangement of co-frames each containing a different length scale of grid elements [Malik, N. A. US Patent No. US 9,599,269 B2 (2017)] and possessing a much bigger parameter space than the flat 2D fractal square grid (2DF). Using DNS we compare the characteristics of the turbulence (mean flow, turbulence intensity, energy spectrum) generated by different types of 3DS grids. The peak intensities generated by 3DS can exceed the peaks generated by the 2DF by 80%; we observe that a 3DS with blockage ratio 24% produces turbulence similar to the 2DF with blockage ratio 32% implying lower energy input for the same turbulence.

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BT - Springer Proceedings in Mathematics & Statistics

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ER -

A Comparison of Turbulence Generated by 3DS Sparse Grids with Different Blockage Ratios and Different Co-frame Arrangements

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