Large-eddy simulation of passive shock-wave/boundary-layer interaction control
Pasquariello, V., Grilli, M., Hickel, S., Adams, N.A. (2014)
International Journal of Heat and Fluid Flow 49: 116-127. doi: 10.1016/j.ijheatfluidflow.2014.04.005
We investigate a passive flow-control technique for the interaction of an oblique shock generated by an 8.8° wedge with a turbulent boundary-layer at a free-stream Mach number of Ma∞ = 2.3 and a Reynolds number based on the incoming boundary-layer thickness of Reδ = 60 500 by means of large-eddy simulation (LES).
On the application of WKB theory for the simulation of the weakly nonlinear dynamics of gravity waves
Muraschko, J., Fruman, M.D., Achatz, U., Hickel, S., Toledo, Y. (2015)
Quarterly Journal of the Royal Meteorological Society 141: 676-697. doi: 10.1002/qj.2381
The dynamics of internal gravity waves is modelled using Wentzel–Kramer–Brillouin (WKB) theory in position–wave number phase space. A transport equation for the phase-space wave-action density is derived for describing one-dimensional wave fields in a background with height-dependent stratification and height- and time-dependent horizontal-mean horizontal wind, where the mean wind is coupled to the waves through the divergence of the mean vertical flux of horizontal momentum associated with the waves.
Direct numerical simulation of a breaking inertia-gravity wave
Remmler, S., Fruman, M.D., Hickel, S. (2013)
Journal of Fluid Mechanics 722: 424-436. doi: 10.1017/jfm.2013.108
We have performed fully resolved three-dimensional numerical simulations of a statically unstable monochromatic inertia–gravity wave using the Boussinesq equations on an f - plane with constant stratification. The chosen parameters represent a gravity wave with almost vertical direction of propagation and a wavelength of 3 km breaking in the middle atmosphere.