Numerical simulation of turbulent flow in an eccentric channel

Candela, Diana Caterinne Sandoval; Gomes, Thiago Ferreira; Goulart, Jhon Nero Vaz; Anflor, Carla Tatiana Mota

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DC Field	Value	Language
dc.contributor.author	Candela, Diana Caterinne Sandoval	-
dc.contributor.author	Gomes, Thiago Ferreira	-
dc.contributor.author	Goulart, Jhon Nero Vaz	-
dc.contributor.author	Anflor, Carla Tatiana Mota	-
dc.date.accessioned	2020-10-07T13:01:32Z	-
dc.date.available	2020-10-07T13:01:32Z	-
dc.date.issued	2020-10	-
dc.identifier.citation	CANDELA, Diana Sandoval et al. Numerical simulation of turbulent flow in an eccentric channel. European Journal of Mechanics - B/Fluids, v. 83, p. 86-98, set./out. 2020. DOI: https://doi.org/10.1016/j.euromechflu.2020.04.003. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0997754619304601?via%3Dihub.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/39514	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Numerical simulation of turbulent flow in an eccentric channel	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Simulação numérica	pt_BR
dc.subject.keyword	Escoamento	pt_BR
dc.subject.keyword	Mecânica dos fluidos	pt_BR
dc.subject.keyword	Dinâmica dos fluidos	pt_BR
dc.subject.keyword	Turbulência	pt_BR
dc.identifier.doi	https://doi.org/10.1016/j.euromechflu.2020.04.003	pt_BR
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/abs/pii/S0997754619304601?via%3Dihub	pt_BR
dc.description.abstract1	The aim of this work is to perform a numerical simulation of the turbulent flow in an eccentric channel for a Reynolds number ReDh = 7300. The Reynolds number is based on the bulk velocity, UBulk, the hydraulic-diameter, Dh, and the kinematic viscosity, ν. To achieve this goal, a hybrid RANS/LES turbulence model called DES-SST is used. In this formulation, special functions are computed to convert the model from RANS close to the walls to LES in more remote regions. Besides the Reynolds number, the main dimensionless parameter related to the geometry involves the narrow gap between the outer and inner walls of the pipes and their diameters, D and d, respectively. These geometric parameters are related to the eccentricity, e, and the d/D ratio. Both of these parameters were kept constant at 0.80 and 0.50, respectively, throughout the work, as the channel’s length, L = 1500 mm. The numerical results are compared with experimental outcomes for a water channel with the same Reynolds number using PIV measurements. The hybrid scheme was able to capture the onset of gap instability, short after the channel’s inlet. Furthermore, the mass flow distribution along the channel and the flow velocity patterns were also successfully predicted by the numerical code. The Strouhal number was found to be in fair agreement with the experimental result. The large-scale structures were found to spread over the whole cross-section. The main frequency produced by the oscillatory motion in the tight gap was seen to be twice as high as that found in the lateral subchannel.	pt_BR
dc.description.unidade	Faculdade UnB Gama (FGA)	-
Appears in Collections:	Artigos publicados em periódicos e afins