Publications associées à Buoyant Turbulent Kinetic Energy Production in Steep-Slope Katabatic Flow

Counter-Gradient, Co-Gradient and ‘Surface-Layer' Momentum Fluxes in Nocturnal Slope Flows over Steep Alpine Terrain

Marc Parlange, Holly Jayne Oldroyd, Eric Richard Pardyjak

Generally, the more an underlying terrain deviates from being flat, uniform and homogeneous, the less that classical theories and models of the atmospheric boundary layer hold. At times this leads to high uncertainties in turbulent flux predictions, and at ...

2016

Adapting tilt corrections and the governing flow equations for steep, fully three-dimensional, mountainous terrain

Wolf Hendrik Huwald, Marc Parlange, Holly Jayne Oldroyd, Eric Richard Pardyjak

In recent studies of atmospheric turbulent surface exchange in complex terrain, questions arise concerning velocity-sensor tilt corrections and the governing flow equations for coordinate systems aligned with steep slopes. The standard planar-fit method, a ...

2016

Buoyant turbulence kinetic energy (TKE) production in katabatic flow despite stable thermal stratification

Marc Parlange, Chad Higgins, Holly Jayne Oldroyd, Eric Richard Pardyjak

As micrometeorological research shifts to increasingly non-idealized environments, the lens through which we view classical atmospheric boundary layer theory must also shift to accommodate unfamiliar behavior. We present observations of katabatic flow over ...

2015

Stability analysis of boundary layers controlled by miniature vortex generators

Lorenzo Siconolfi

It is currently known that Tollmien–Schlichting (TS) waves can be attenuated by the introduction of spanwise mean velocity gradients in an otherwise two-dimensional boundary layer (BL). The stabilizing effect, associated with an extra turbulence production ...

Cambridge University Press2015

Influence of atmospheric stability on wind-turbine wakes: A large-eddy simulation study

Fernando Porté Agel, Mahdi Abkar

In this study, large-eddy simulation is combined with a turbine model to investigate the influence of atmospheric thermal stability on wind-turbine wakes. The simulation results show that atmospheric stability has a significant effect on the spatial distri ...

American Institute of Physics2015

Air Entrainment in Skimming Flow on Stepped Spillways: the Effect of an Abrupt Slope Change

Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Mohammad Javad Ostad Mirza

Numerous stepped spillways were built during the last decades. In particular, a stepped spillway may be integrated economically into the downstream face of a RCC gravity dam, or on valley flanks besides embankment or rockfill dams, where slope changes may ...

2015

Prediction of the hub vortex instability in a wind turbine wake: stability analysis with eddy-viscosity models calibrated on wind tunnel data

Fernando Porté Agel, François Gallaire, Giacomo Valerio Iungo, Francesco Viola

The instability of the hub vortex observed in wind turbine wakes has recently been studied by Iungo et al. (J. Fluid Mech., vol. 737, 2013, pp. 499–526) via local stability analysis of the mean velocity field measured through wind tunnel experiments. This ...

Cambridge University Press2014

Wind-tunnel experiments of thermally-stratified turbulent boundary layer flow over a wall-mounted 2-D block

Fernando Porté Agel, Wei Zhang, Corey Dean Markfort

Turbulent boundary-layer flows over complex topography have been extensively studied in the atmospheric sciences and wind engineering communities. The upwind turbulence level, the atmospheric thermal stability and the shape of the topography as well as sur ...

2014

Simulations of a double-diffusive interface in the diffusive convection regime

Alfred Johny Wüest

Three-dimensional direct numerical simulations are performed that give us an in-depth account of the evolution and structure of the double-diffusive interface. We examine the diffusive convection regime, which, in the oceanographically relevant case, consi ...

Cambridge University Press2012

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Buoyant Turbulent Kinetic Energy Production in Steep-Slope Katabatic Flow

Counter-Gradient, Co-Gradient and ‘Surface-Layer' Momentum Fluxes in Nocturnal Slope Flows over Steep Alpine Terrain

Adapting tilt corrections and the governing flow equations for steep, fully three-dimensional, mountainous terrain

Turbulent Transport in Complex, Alpine Environments

Buoyant turbulence kinetic energy (TKE) production in katabatic flow despite stable thermal stratification

Stability analysis of boundary layers controlled by miniature vortex generators

Influence of atmospheric stability on wind-turbine wakes: A large-eddy simulation study

Air Entrainment in Skimming Flow on Stepped Spillways: the Effect of an Abrupt Slope Change

Prediction of the hub vortex instability in a wind turbine wake: stability analysis with eddy-viscosity models calibrated on wind tunnel data

Wind-tunnel experiments of thermally-stratified turbulent boundary layer flow over a wall-mounted 2-D block

Simulations of a double-diffusive interface in the diffusive convection regime

Graph Chatbot

Chattez avec Graph Search

Stability analysis of boundary layers controlled by miniature vortex generators

Adapting tilt corrections and the governing flow equations for steep, fully three-dimensional, mountainous terrain

Counter-Gradient, Co-Gradient and ‘Surface-Layer' Momentum Fluxes in Nocturnal Slope Flows over Steep Alpine Terrain

Buoyant turbulence kinetic energy (TKE) production in katabatic flow despite stable thermal stratification

Turbulent Transport in Complex, Alpine Environments

Prediction of the hub vortex instability in a wind turbine wake: stability analysis with eddy-viscosity models calibrated on wind tunnel data

Simulations of a double-diffusive interface in the diffusive convection regime

Wind-tunnel experiments of thermally-stratified turbulent boundary layer flow over a wall-mounted 2-D block

Influence of atmospheric stability on wind-turbine wakes: A large-eddy simulation study

Air Entrainment in Skimming Flow on Stepped Spillways: the Effect of an Abrupt Slope Change