Modelacion numerica de procesos de mezcla turbulentos inducidos por el viento en cuerpos de agua estratificados

Translated title of the contribution: Numerical modeling of wind induced turbulent mixing processes in stratified water bodies

Y. Nino, F. Lopez, C. Pirard, I. Hillmer, M. H. Garcia

Research output: Contribution to journalArticle

Abstract

The present work reports results of the numerical simulation of wind-induced mixing processes in stably stratified fluids using a two-equation k-ε closure model. Results reported are limited to the case of one-dimensional, zero-pressure gradient flow, corresponding to water bodies of a longitudinal extension that is either very large or very small compared to the depth. Experimental observations provide a benchmark for the verification of the model at relatively low Richardson numbers. Turbulent mixing processes at higher Richardson numbers were also studied from the results of the numerical experiments, with the additional advantage over the laboratory ones of eliminating scale effects. Dimensionless entrainment rates as a function of the Richardson number were estimated, both for water bodies with a two-layer density profile as well as for linear density distributions. These results suggest a common entrainment relationship in both cases. Further analyses of the results from the numerical simulations show a great similarity in the characteristics of the turbulent structure of the mixed layer for both types of stratification, which would explain the apparent universality found for the entrainment law.

Translated title of the contributionNumerical modeling of wind induced turbulent mixing processes in stratified water bodies
Original languageSpanish
Pages (from-to)13-25
Number of pages13
JournalIngenieria Hidraulica en Mexico
Volume15
Issue number1
StatePublished - Jan 1 2000
Externally publishedYes

Keywords

  • Dimensional analysis
  • K-e model
  • Numerical modeling
  • Stratified flows
  • Stratified water bodies
  • Turbulence
  • Wind-induced mixing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

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