Comparação entre coeficientes de difusão derivados do espectro de energia turbulenta e coeficientes de difusão que dependem da razão entre os fluxos de entranhamento e os de superfície

Authors

  • Gervásio Annes Degrazia Departamento de Física, Universidade Federal de Santa Maria, Santa Maria, RS https://orcid.org/0000-0002-4304-1748
  • Alnei Ramos Prochnow Departamento de Física, Universidade Federal de Santa Maria, Santa Maria, RS
  • Davidson M. Moreira Engenharia, Ambiente e Materiais, Universidade Luterana do Brasil, Canoas, RS
  • André B. Nunes Departamento de Meteorologia, Universidade Federal de Pelotas, Pelotas, RS
  • Cláudia R. J. de Campos Departamento de Meteorologia, Universidade Federal de Pelotas, Pelotas, RS
  • Fabiane A. Fonseca Departamento de Física, Universidade Federal de Pelotas, Pelotas, RS

DOI:

https://doi.org/10.5902/2179460X63508

Abstract

A most of contaminants turbulent dispersion in Planetary Boundary Layer (CLP) research is related with the concentration turbulent fluxes specification. An approach for these unknown terms allow to solve the diffusion-advection equation. The specification process of concentration turbulent fluxes parameterization is called as closure problem of turbulent transport. The simplest mathematics scheme which lead to a diffusion advection equation solution employ eddy diffusivities that relates the concentration turbulent fluxes to mean concentration gradient. In this work, employing a Eulerian dispersion model and concentration data, eddy diffusivities, derived of turbulent energy spectrum and that which depends of ratio between entrainment and surface fluxes, will be used in superficial concentration field simulation.

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References

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Published

2002-01-18

How to Cite

Degrazia, G. A., Prochnow, A. R., Moreira, D. M., Nunes, A. B., Campos, C. R. J. de, & Fonseca, F. A. (2002). Comparação entre coeficientes de difusão derivados do espectro de energia turbulenta e coeficientes de difusão que dependem da razão entre os fluxos de entranhamento e os de superfície. Ciência E Natura, 09–20. https://doi.org/10.5902/2179460X63508

Issue

CIÊNCIA E NATURA, SPECIAL VOLUME, 2002: II WORKSHOP ON PHYSICS OF THE PLANETARY BOUNDARY LAYER AND DISPERSION PROCESS MODELING

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Articles

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