On the significance of form-induced stress in rough wall turbulent boundary layers

• Autorzy: Manes C. , Pokrajac D. , Coceal O. , McEwan I.
• Języki publikacji: EN

Abstrakty

EN

This paper presents a review of recent experimental and numerical studies which deal with the analysis of form-induced stress in rough wall turbulent boundary layers. The aim of the paper is to assess the importance of this stress for various rough wall geometries and flow conditions. Analysis of the significance of form-induced stress is first performed by comparing its magnitude with the magnitude of Reynolds stress for each data set available in literature. Then, by selecting a special set of data, we analyze the comparison between the gradients of both stresses. We point out that the comparison of stress gradients gives a different perspective on the role of form-induced stress in rough wall boundary layers.

Słowa kluczowe

EN

form-induced stress; rough wall boundary layers; Reynolds stress

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2008
• Tom: Vol. 56, no. 3
• Strony: 845--861
• Opis fizyczny: bibliogr. 23 poz.

Twórcy

autor

Manes C.

autor

Pokrajac D.

autor

Coceal O.

autor

McEwan I.

• Institute for Snow and Avalanche Research, SLF, Davos, Switzerland,

Bibliografia

• Aberle, J. (2006), Spatially averaged near-bed flow field over rough armor layers. In: A.H. Cardoso and R. Ferreira (eds.), Proc. Intern. Conf. on Fluvial Hydraulics, River Flow 2006, Balkema, Brookfield, VT.
• Bohm, M., J.J Finnigan, and M.R. Raupach (2000), Dispersive fluxes and canopy flows: Just how important are they? 24th Conf. on Agricultural and Forest Meteorology, 14-18 August 2000, University of California, Davis, CA, 106-107.
• Campbell, L.J., I.K. McEwan, V.I. Nikora, D. Pokrajac, M. Gallagher, and C. Manes (2005), Bed load effects on hydrodynamics of rough bed open channel flows, J. Hydraul. Eng. ASCE 131, 7.
• Coceal, O., T.G. Thomas, I.P. Castro, and S.E. Belcher (2006), Mean flow and turbulence statistics over groups of urban-like cubical obstacles, Bound.-Layer Meteor. 121, 491-519.
• Coceal, O., T.G. Thomas, and S.E. Belcher (2008), Spatially-averaged flow statistics within a canopy of large bluff bodies: Results from direct numerical simulations, Acta Geophys. 56, 3.
• Gimenez-Curto, L.A., and M.A. Corniero Lera (1996), Oscillating turbulent flow over very rough surfaces, J. Geophys. Res. 101, C9, 20,745-20,758.
• Kaimal, J.C., and J.J. Finnigan (1994), Atmospheric Boundary Layer Flows: Their Structure and Measurement, Oxford University Press, Oxford, 289 pp.
• Klevicki, J., P. Fife, T. Wei, and P. McMurtry (2007), A physical model of the turbulent boundary layer consonant with mean momentum balance structure, Phil. Trans. Roy. Soc. Lond. A 365, 823-839, DOI: 10.1098/rsta.2006.1944.
• Maddux, T.B., S.R. McLean, and J.M. Nelson (2003), Turbulent flow over three dimensional dunes: 2. Fluid and bed stresses, J. Geophys. Res. 108, F1, 6010, DOI: 10.1029/2003JF000018.
• Manes, C., D. Pokrajac, and I.K. McEwan (2007), Double averaged open channel flows with small relative submergence, J. Hydraul. Eng. ASCE 133, 896-904.
• McLean, S.R. and V.I. Nikora (2006), Characteristics of turbulent unidirectional flow over rough beds: Double-averaging perspective with particular focus on sand dunes and gravel beds, Water Resour. Res. 42, W10409, DOI: 10.1029/2005WR004708.
• McLean, S.R., J.M. Nelson and S.R. Wolfe (1994), Turbulence structure over two dimensional bed forms: Implications for sediment transport, J. Geophys. Res. 99, C6, 12,729-12,747.
• Nikora, V., D.G. Goring, I.K. McEwan, and G. Griffiths (2001), Spatially averaged open-channel flow over a rough bed, J. Hydraul. Eng. ASCE 127, 123-133.
• Nikora, V., I.K. McEwan, S.R. McLean, S. Coleman, D. Pokrajac, and R. Walters (2007), Double-averaging concept for rough-bed open-channel and overland flows: Theoretical background, J. Hydraul. Eng. 133, 8, 873-883.
• Pokrajac, D., and C. Manes (2008), Interface between turbulent flows above and within rough porous walls, Acta Geophys. 56, 3.
• Pokrajac, D., L.J. Campbell, V.I. Nikora, C. Manes, and I.K. McEwan (2007), Quadrant analysis of persistent spatial velocity perturbations over squarebar roughness, Experiments in Fluids 42, 3, 413-423.
• Poggi, D., G.G. Katul, and J.D. Albertson (2004a), A note on the contribution of dispersive fluxes to momentum transfer within canopies, Bound.-Layer Meteor. 111, 615-621.
• Poggi, D., A. Porporato, L. Ridolfi, J.D. Albertson, and G.G. Katul (2004b), The effect of vegetation density on canopy sub-layer turbulence, Bound.-Layer Meteor. 111, 565-587.
• Raupach, M.R. (1994), Simplified expressions for vegetation roughness length and zero-plane displacement as functions of canopy height and area index, Bound.-Layer Meteor. 71, 211-216.
• Raupach, M.R., and A.S. Thom (1981), Turbulence in and above plant canopies, Ann. Rev. Fluid Mech. 13, 97-129.
• Taylor, P.A. (1988), Turbulent wakes in the atmospheric boundary layer. In: W.L. Steffen and O.T. Denmead (eds.), Flow and Transport in the Natural Environment: Advances and Applications, Springer-Verlag, New York, 270-292.
• Wei, T., P. Fife, J. Klevicki, and P. McMurtry (2005), Properties of the mean momentum balance in turbulent boundary layers, J. Fluid Mech. 522, 303-327.
• Wilson, N.R., and R. Shaw (1977), A higher order closure model for canopy flow, J. Appl. Meteor. 16, 1198-1205.