Analysis of streamline curvature effects on wall-bounded turbulent flows

Autor:	B. Lakshminarayana, Jiang Luo
Rok vydání:	1997
Předmět:	Physics::Fluid Dynamics Görtler vortices Boundary layer Turbulent diffusion Turbulence Aerospace Engineering Geometry Reynolds stress equation model Mechanics Reynolds stress Curvature Mathematics Pipe flow
Zdroj:	AIAA Journal. 35:1273-1279
ISSN:	1533-385X 0001-1452
Popis:	We deal with numerical analysis for the effects of surface curvature, particularly the concave curvature; on turbulent duct flows and boundary layers. A compressible Navier-Stokes code incorporating Reynolds stress models has been developed using a four-stage Runge-Kutta scheme. Numerical computations have been carried out for curved flows in 180-deg and 90-deg turning ducts and a turbulent boundary layer using Reynolds stress models with/without modifications to the dissipation rate (e) equation. Various modifications to the e equation are discussed. A quantitative relationship has been established between two seemingly different modifications to the e equation. It is observed that the modeling of concave curvature effect is qualitatively different from the modeling of convex curvature effect. Detailed comparisons between computations and data indicate that, to capture the strong amplification of turbulence near a concave wall, the standard e equation needs to be modified.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f674b151e97a575b9b49ca7d49e9d064 https://doi.org/10.2514/3.13665 Zobrazit plný text záznamu