Small-scale mixing at the turbulent/non-turbulent interface in turbulent jets
نویسندگان
چکیده
منابع مشابه
Small-scale anisotropy in turbulent shearless mixing.
The generation of small-scale anisotropy in turbulent shearless mixing is numerically investigated. Data from direct numerical simulations at Taylor Reynolds' numbers between 45 and 150 show not only that there is a significant departure of the longitudinal velocity derivative moments from the values found in homogeneous and isotropic turbulence but that the variation of skewness has an opposit...
متن کاملSupplemental material Small scale anisotropy in the turbulent shearless mixing
The shearless mixing layer is constructed by combining two cubic simulation domains that each contain isotropic turbulences with different energy levels. The computational domain is a parallelepiped with aspect ratio equal to two (2L × L × L, L = 2π in dimensionless variables). Periodic boundary conditions are imposed in all directions. To satisfy this condition, the domain should host two shea...
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Kinematic dynamo theory is presented here for turbulent conductive fluids. We describe how inhomogeneous magnetic fluctuations are generated below the viscous scale of turbulence where the spatial smoothness of the velocity permits a systematic analysis of the Lagrangian path dynamics. We find analytically the moments and multipoint correlation functions of the magnetic field at small yet finit...
متن کاملan experimental study of turbulent mixing near a density interface
the entrainment of a stably stratified layer into a turbulent mixed layer in a confined region has been studied in the laboratory for different richardson numbers, ri. the results include direct observation of turbulent characteristics and density measurements using two high precision salinity meters. the measurements include turbulence intensity, scale of eddies near the interface and energy s...
متن کاملShock-induced mixing of nonhomogeneous density turbulent jets
An experimental study of the mixing enhancement and changes in flow structure arising from the interaction of weak normal shock waves with turbulent jets was conducted. The experimental configuration was an axisymmetric jet processed by weak normal shock waves propagating in a shock tube along the jet axis. Experiments involved three different jet gases: helium, air, and carbon dioxide, each in...
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ژورنال
عنوان ژورنال: PAMM
سال: 2011
ISSN: 1617-7061
DOI: 10.1002/pamm.201110290