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Turbulent Rayleigh-Bénard convection described by projected dynamics in phase space
Johannes Lülff, Michael Wilczek, Richard J. A. M. Stevens +2
Rayleigh-Bénard convection, i.e. the flow of a fluid between two parallel plates that is driven by a temperature gradient, is an idealised setup to study thermal convection. Of spe…
Spatio-temporal spectra in the logarithmic layer of wall turbulence: large-eddy simulations and simple models
Michael Wilczek, Richard J. A. M. Stevens, Charles Meneveau
Motivated by the need to characterize the spatio-temporal structure of turbulence in wall-bounded flows, we study wavenumber-frequency spectra of the streamwise velocity component…
Kinetic Energy Transport in Rayleigh--Bénard Convection
Klaus Petschel, Stephan Stellmach, Michael Wilczek +2
The kinetic energy balance in Rayleigh--Bénard convection is investigated for the Prandtl number range and for fixed Rayleigh number . The kin…
Large-eddy simulation study of the logarithmic law for second and higher-order moments in turbulent wall-bounded flow
Richard J. A. M. Stevens, Michael Wilczek, Charles Meneveau
The logarithmic law for the mean velocity in turbulent boundary layers has long provided a valuable and robust reference for comparison with theories, models, and large-eddy simula…
Pressure Hessian and viscous contributions to velocity gradient statistics based on Gaussian random fields
Michael Wilczek, Charles Meneveau
Understanding the non-local pressure contributions and viscous effects on the small-scale statistics remains one of the central challenges in the study of homogeneous isotropic tur…