Reprint of: Variational multiscale modeling of Langmuir turbulent boundary layers in shallow water using Isogeometric Analysis

Qiming Zhu, Jinhui Yan, Andrés E. Tejada-Martínez, Yuri Bazilevs

Research output: Contribution to journalArticlepeer-review

Abstract

We present large-eddy simulations (LES) of wind and wave-driven turbulent boundary layers in shallow water with Langmuir circulation using a variational multi-scale formulation of the Craik-Leibovich equations. The simulations are performed using Isogeometric Analysis (IGA) based on quadratic non-uniform rational basis spline (NURBS) basis functions. Wind and wave-driven turbulent boundary layers over a flat bottom surface representative of open ocean conditions in inner-shelf regions with turbulent Langmuir number Lat=0.7 and wind stress friction Reynolds number Reτ=395 are first simulated. The present results agree well with the reference results based on a spectral LES with higher mesh resolution [1]. Then, to investigate the effect of seabed topography on the turbulence, we simulate turbulent boundary layers over a sloped bottom surface with wind and wave forcing parallel to the shore, representative of a surf-shelf transition zone. We find that the Langmuir cell size increases as the water column shallows approaching onshore and the cell center shifts to the onshore direction. The mean velocity and turbulent kinetic energy along the shore are quantified.

Original languageEnglish (US)
Article number103703
JournalMechanics Research Communications
Volume112
DOIs
StatePublished - Mar 2021

Keywords

  • IGA
  • LES
  • Langmuir turbulence
  • RBVMS

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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