Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31903
A Large-Eddy Simulation of Vortex Cell flow with Incoming Turbulent Boundary Layer

Authors: Arpiruk Hokpunna, Michael Manhart

Abstract:

We present a Large-Eddy simulation of a vortex cell with circular shaped. The results show that the flow field can be sub divided into four important zones, the shear layer above the cavity, the stagnation zone, the vortex core in the cavity and the boundary layer along the wall of the cavity. It is shown that the vortex core consits of solid body rotation without much turbulence activity. The vortex is mainly driven by high energy packets that are driven into the cavity from the stagnation point region and by entrainment of fluid from the cavity into the shear layer. The physics in the boundary layer along the cavity-s wall seems to be far from that of a canonical boundary layer which might be a crucial point for modelling this flow.

Keywords: Turbulent flow, Large eddy simulations, boundary layer and cavity flow, vortex cell flow.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1062554

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 8089

References:


[1] J. Smagorinsky. General Circulation experiments with the primitive equations. Mon. Wea. Rev. , 91:99-164 , 1963.
[2] M. Germano, U. Piomelli, P. Moin and W. H. Cabot. A Dynamic Subgrid-Scale Eddy Viscosity Model. Physics of Fluids A, 3(7):1760- 1765 ,1991.
[3] C. Meneveau, T. S. Lund and W. H. Cabot. A Lagrangian dynamic subgrid-scale model of turbulence. Journal of Fluid Mechanics., 319:353-385, 1996.
[4] N. Peller, A. Le Duc, F. Tremblay, and M. Manhart. High-order stable interpolations for immersed boundary methods. International Journal for Numerical Methods in Fluids, in press, 2006.
[5] M. Manhart. A zonal grid algorithm for DNS of turbulent boundary layers. Computers & FLuids, 33(3):435-461, 2004.
[6] J.H.Ferziger and M. Peric. Computational Methods for Fluid Dynamics. Springer, 1996.
[7] P. R. Spalart. Direct simulation of a turbulent boundary layer up to R╬© = 1410. Journal of Fluid Mechanics., 187:61-98, 1988.
[8] M. Manhart and R. Friedrich. DNS of a turbulent boundary layer with separation. Int. J. Heat and Fluid Flow, 23(5):572-581, 2002.
[9] T. S. Lund, X. Wu and K. D. Squires. Generation of Turbulent Inflow Data for Spatially-Developing Boundary Layer Simulations. Journal of Computational Physics, 140:223-258, 1998.
[10] F. Tremblay, M. Manhart, and R. Friedrich. DNS and LES of flow around a circular cylinder at a subcritical Reynolds number with Cartesian grids. In R. Friedrich and W. Rodi, editors, LES of complex transitional and turbulent flows, p.133-150, Dordrecht, 2001. Kluwer Academic Publishers.
[11] H.H. Fernholz ,P.J. Finley. The incompressible zero-pressure-gradient turbulent boundary layer: an assessment of the data. Prog Aerospace Sci, 32:245-311
[12] I.P. Castro and A. Haque. The structure of a turbulent shear layer bounding a separation region. J. Fluid Mech., 179:439-468, 1987.
[13] M. Manhart. Vortex shedding from a hemisphere in a turbulent boundary layer. Theoretical and Computational Fluid Dynamics, 12(1):1-28, 1998.