COMPARISON OF LES AND DURBIN TYPE k-ε MODEL FOR GAS DIFFUSION IN WEAK WIND REGION BEHIND A BUILDING

Autor:	Yoshinobu Endo, Taichi Shirasawa, Hideyuki Tanaka, Ryuichiro Yoshie, Akashi Mochida
Rok vydání:	2008
Předmět:	Physics::Fluid Dynamics Environmental Engineering Flow (psychology) Statistics Gaseous diffusion Mechanics Type (model theory) Wake Diffusion (business) Vortex shedding Wind speed Large eddy simulation Mathematics
Zdroj:	Journal of Environmental Engineering (Transactions of AIJ). 73:615-622
ISSN:	1881-817X 1348-0685
DOI:	10.3130/aije.73.615
Popis:	Flow and diffusion fields around a building were predicted by LES and Durbin type k-e model. The prediction accuracy of the both models was assessed by comparing their results with those obtained by wind tunnel test. The results of LES showed good agreement with experimental data in terms of mean wind velocity, turbulence statistics and mean gas concentration, while the significant differences were observed between the results of the experiment and the Durbin type k-e model concerning the flow and diffusion fields in the wake region behind the building. This is mainly due to the fact that the periodic motions caused by the vortex shedding were not reproduced by this model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::61b71efc379299bd5e3ea81b103b71d2 https://doi.org/10.3130/aije.73.615 Zobrazit plný text záznamu