Improving a Two-Equation Turbulence Model for Canopy Flows Using Large-Eddy Simulation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Silva Lopes, AS (Autor) FEUP; Palma, JMLM (Autor) FEUP; Viana Lopes, JV (Autor) FEUP

Revista

Título: Boundary-Layer Meteorology

Vol. 149

Páginas: 231-257

ISSN: 0006-8314

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 19 Citações

Scopus - 22 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-006-6E7

DOI: 10.1007/s10546-013-9850-x

Abstract (EN): Large-eddy simulations of the neutrally-stratified flow over an extended homogeneous forest were used to calibrate a canopy model for the Reynolds-averaged Navier-Stokes (RaNS) method with the turbulence model. It was found that, when modelling the forest as a porous medium, the canopy drag dissipates the turbulent kinetic energy (acts as a sink term). The proposed model was then tested in more complex flows: a finite length forest and a forested hill. In the finite length forest, the destruction of the turbulent kinetic energy by the canopy was overestimated near the edge, for a length approximately twice the tree height. In the forested hill, the model was less accurate inside the recirculation zone and overestimated the turbulent kinetic energy, due to an incorrect prediction of the production term. Nevertheless, the canopy model presented here provided consistent results in both a priori and a posteriori tests and improved the accuracy of RaNS simulations with the model.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 27