𝔖 Bobbio Scriptorium
✦   LIBER   ✦

CALCULATION OF WALL-BOUNDED COMPLEX FLOWS AND FREE SHEAR FLOWS

✍ Scribed by T.-H. SHIH; J. ZHU; JOHN L. LUMLEY

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
568 KB
Volume
23
Category
Article
ISSN
0271-2091

No coin nor oath required. For personal study only.

✦ Synopsis

Various wall-bounded flows with complex geometries and free shear flows have been studied with a newly developed realizable Reynolds stress algebraic equation model. The model development is based on the invariant theory in continuum mechanics. This theory enables us to formulate a general constitutive relation for the Reynolds stresses. Pope (J. Fhid Mech., 72, 331-340 (1975)) was the first to introduce this kind of constitutive relation to turbulence modelling. In our study, realizability is imposed on the truncated constitutive relation to determine the coefficients so that, unlike the standard k -~ eddy viscosity model, the present model will not produce negative normal stresses in any situations of rapid distortion. The calculations based on the present model have shown encouraging success in modelling complex turbulent flows.

πŸ“œ SIMILAR VOLUMES

Investigation of supersonic modes and th
Investigation of supersonic modes and three-dimensionality in bounded, free shear flows
✍ MichΓ©le G. Macaraeg πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 English βš– 498 KB

It is found through two-dimensional temporal simulations of high-speed free shear layers that mean flow distortion is significantly increased when supersonic disturbances are introduced as initial conditions. The shear layer exhibits no subharmonic growth or roll-up, but rather a spectral broadening

Large Eddy Simulation of High-Reynolds-N
Large Eddy Simulation of High-Reynolds-Number Free and Wall-Bounded Flows
✍ Christer Fureby; Fernando F. Grinstein πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 English βš– 871 KB

The ability to simulate complex unsteady flows is limited by the current state of the art of subgrid-scale (SGS) modeling, which invariably relies on the use of Smagorinsky-type isotropic eddy-viscosity models. Turbulent flows of practical importance involve inherently three-dimensional unsteady fea

Scaling laws and vanishing-viscosity lim
Scaling laws and vanishing-viscosity limits for wall-bounded shear flows and for local structure in developed turbulence
✍ G. I. Barenblatt; Alexandre J. Chorin πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 127 KB

Scaling laws for wall-bounded turbulence are derived and their properties are analyzed via vanishing-viscosity asymptotics; a comparison of the results with recent experiments shows that the observed scaling law differs significantly from the customary logarithmic law of the wall. The Izakson-Millik