TY - GEN
T1 - A Comparison of Turbulence Generated by 3DS Sparse Grids with Different Blockage Ratios and Different Co-frame Arrangements
AU - Usama, M. Syed
AU - Malik, Nadeem A.
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
Y1 - 2021/8/30
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.
UR - http://hdl.handle.net/10754/672160
UR - https://link.springer.com/10.1007/978-3-030-63591-6_30
UR - http://www.scopus.com/inward/record.url?scp=85115144422&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-63591-6_30
DO - 10.1007/978-3-030-63591-6_30
M3 - Conference contribution
SN - 9783030635909
SP - 325
EP - 334
BT - Springer Proceedings in Mathematics & Statistics
PB - Springer International Publishing
ER -