55 citations · 120 across the 12 of their papers we have counts for
12 papers
Modelling Farm-to-Farm Interaction Using a Fast Linearised Numerical Approach
Alexia Everley, Hossein A. Kafiabad, Majid Bastankhah
This paper presents a computationally efficient, linearised numerical method for modelling aerodynamic interactions between wind farms. The linearised two-dimensional incompressibl…
Two-way coupling of gravity waves and wind farm wakes: a reduced-order boundary-layer model
Hossein A. Kafiabad, Majid Bastankhah
This paper develops a reduced-order numerical framework for modelling the two-way coupling between gravity waves and turbulent wakes in large-scale wind farms. Starting with the no…
Efficient Lagrangian averaging with exponential filters
Abhijeet Minz, Lois E. Baker, Hossein A. Kafiabad +1
Lagrangian averaging is a valuable tool for the analysis and modelling of multiscale processes in fluid dynamics. The numerical computation of Lagrangian (time) averages from simul…
Inhomogeneity-induced wavenumber diffusion
Michael R. Cox, Hossein A. Kafiabad, Jacques Vanneste
Inertia-gravity waves are scattered by background flows as a result of Doppler shift by a non-uniform velocity. In the WKB regime, the scattering process reduces to a diffusion in…
Lagrangian filtering for wave-mean flow decomposition
Lois E. Baker, Hossein A. Kafiabad, Cai Maitland-Davies +1
Geophysical flows are typically composed of wave and mean motions with a wide range of overlapping temporal scales, making separation between the two types of motion in wave-resolv…
Computing Lagrangian means
Hossein A. Kafiabad, Jacques Vanneste
Lagrangian averaging plays an important role in the analysis of wave--mean-flow interactions and other multiscale fluid phenomena. The numerical computation of Lagrangian means, e.…
Inertia-gravity-wave diffusion by geostrophic turbulence: the impact of flow time dependence
Michael R. Cox, Hossein A. Kafiabad, Jacques Vanneste
The scattering of three-dimensional inertia-gravity waves by a turbulent geostrophic flow leads to the redistribution of their action through what is approximately a diffusion proc…
Grid-based calculation of Lagrangian mean
Hossein Kafiabad
Lagrangian averaging has been shown to be more effective than Eulerian mean in separating waves from slow dynamics in two-timescale flows. It also appears in many reduced models th…
Interaction of near-inertial waves with an anticyclonic vortex
Hossein A. Kafiabad, Jacques Vanneste, William R. Young
Anticyclonic vortices focus and trap near-inertial waves so that near-inertial energy levels are elevated within the vortex core. Some aspects of this process, including the nonlin…
Inertia-gravity-wave scattering by geostrophic turbulence
Miles A. C. Savva, Hossein A. Kafiabad, Jacques Vanneste
In rotating stratified flows including in the atmosphere and ocean, inertia-gravity waves (IGWs) often coexist with a geostrophically balanced turbulent flow. Advection and refract…
Wave-averaged balance: a simple example
Hossein A. Kafiabad, Jacques Vanneste, William R. Young
In the presence of inertia-gravity waves, the geostrophic and hydrostatic balance that characterises the slow dynamics of rapidly rotating, strongly stratified flows holds in a tim…
Diffusion of inertia-gravity waves by geostrophic turbulence
Hossein Kafiabad, Miles A. C. Savva, Jacques Vanneste
The scattering of inertia-gravity waves by large-scale geostrophic turbulence in a rapidly rotating, strongly stratified fluid leads to the diffusion of wave energy on the constant…