Anisotropy of reynolds stress tensor in combined wave-current flow

Santosh Kumar Singh, Pankaj Kumar Raushan, Pankaj Kumar, Koustuv Debnath

Research output: Contribution to journalArticlepeer-review


This study examines the turbulent stress anisotropy tensor based on the Lumley triangle technique and eigenvalues in wave-current combined flows. The invariant functions are also presented at a different vertical location from the bed to comprehend the level of anisotropy in the combined flow. The spectral variation of the ratio of momentum flux to the turbulent kinetic energy is examined and discussed in comparison to the canonical value. The combined wave.current data display spectral variation considerably smaller than the canonical value (≈0.3) through the spectral frequencies domain. To characterize the behaviors of eddies in the wave.current turbulent flow, the Taylor and Kolmogorov length and time scales were analyzed and discussed. Furthermore, to enumerate the degree of organization of complex eddy motions in the combined flow, the normalized Shannon entropy is also evaluated using a discrete probability distribution.

Original languageEnglish
Article number051202
JournalJournal of Offshore Mechanics and Arctic Engineering
Issue number5
StatePublished - Oct 2021
Externally publishedYes


  • Anisotropy
  • Coastal engineering
  • Hydrodynamics
  • Length scales
  • Turbulence
  • Wave mechanics and wave effects
  • Wave-current


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