Turbulence anisotropy with higher-order moments in flow through passive grid under rigid boundary influence

Pankaj Kumar Raushan, Santosh Kumar Singh, Koustuv Debnath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The investigation presents the estimate of the degree of deviation from the isotropic turbulence in terms of Reynolds stress tensor for grid generated turbulence under the influence of bottom boundary. The turbulence triangle, Eigen values, and the invariant functions are presented at near and far field regions of the grids with different solidity ratio. In addition, the work also deals with the analysis based on third-order moments of the velocity fluctuations and the ratio of momentum flux to the turbulent kinetic energy in the frequency domain. The Reynolds stress anisotropy exposes that the anisotropic invariant maps possess a closed looping trend in the near field region and an open looping trend in the far-field region of the grid. Further, to describe the physical behaviour of the velocity time-series of random fluctuating components in the stream-wise directions, the probability distribution function are estimated and interpreted.

Original languageEnglish
Pages (from-to)3859-3874
Number of pages16
JournalProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Issue number19
StatePublished - Oct 2021
Externally publishedYes


  • grid generated turbulence
  • Higher order turbulence
  • invariant function
  • probability distribution function
  • turbulence triangle


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