The shear generated turbulent mixed layer
Dynamics of a turbulent layer generated by velocity jump
... 4 Conclusions A version of the K-` model of fully developed turbulence is used to analyze the expansion of a turbulent layer between parallel fluid flows initially moving with different constant velocities. ...
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Double-diffusive instabilities of a shear-generated magnetic layer
... Department of Applied Mathematics & Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, UK ABSTRACT Previous theoretical work has speculated about the existence of double- diffusive magnetic buoyancy ...
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Influence of suboptimally forced streamwise streaks on the turbulent boundary layer and shear layer
... modified turbulent boundary layer and shear layer are ...boundary layer thicknesses from their ...gradient turbulent boundary ...
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Effective forcing for direct numerical simulations of the shear layer of turbulent free shear flows
... Simulations were performed with the additional linear and nonlinear source terms, and compared with the pure shear simulations, with a special attention to Reynolds shear stress, turbule[r] ...
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Adjoint-based sensitivity analysis of ignition in a turbulent reactive shear layer
... a turbulent non-premixed hydrogen–air shear layer subject to an external thermal ...of turbulent combustion systems, it remains to be seen how well the sensitivity gradients behave for longer ...
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Modeling of Turbulent Free Shear Flows
... axisymmetric shear flows, sensitivity to compressibility effects on the flow, and temperature effects on shear layer ...the turbulent shear ...
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Experimental Investigation on the Impact of Wall Heating on Mixed Convection Turbulent Boundary Layer Flow Structure
... From the detailed analysis of Kolmogorov and others in the mid 1900’s three key regions of the velocity spectra can be identified as being critical to the behavior of turbulence [14]. First, the very low wave numbers ...
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AN EXPERIENCE OF USING THE METHOD OF DIRECT NUMERICAL SIMULATION OF LARGE-SCALE TURBULENCE TO THE COMPUTATION OF SUPERSONIC TURBULENT SHEAR LAYER
... Now there are three ways of numerical calculation of complex turbulent flows. The first approach is the use of semiempirical turbulence models for the closure of time-averaged Navier-Stokes equation system. Its ...
Interaction of Alfven waves with a turbulent layer
... 4. Geophysical Consequences 4.1 Pc1 waves in the vicinity of the dayside cusp Many studies have proposed the cusp region as a likely source of some of the Pc1-2 waves observed at high lati- tudes on the ground. Intense ...
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Instability of a free-shear layer in the vicinity of a viscosity-stratified layer
... mixing layer, or a free-shear layer, forms between parallel streams of fluid moving at different velocities and placed adjacent to each ...this layer of shear, which widens as one moves ...
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Turbulent laminar patterns in shear flows without walls
... Schlatter (2013)]. By t = 3000, these structures have pervaded the whole domain. 4. Plane Poiseuille flow To further demonstrate the applications of this stress-free modelling we consider plane Poiseuille flow (PPF), ...
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Physics of flow instability and turbulent transition in shear flows
... be generated after a continuous ...boundary layer flows, hairpin-vortex packets are also found in other wall-bounded shear flows (Hommema and Adrian, ...
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Computational modeling of stably stratified, turbulent shear flows
... of turbulent flows, near- wall treatment at high Reynolds numbers remains a ...wall-generated shear is the main instigator of turbulence, near-wall modeling akin to RANS wall models must be employed ...
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Flux Enhancement By Shear Free Surfaces In A Turbulent Convection
... boundary layer where shear is ...without shear, to derive any benefit from the kinematic wall blocking ...as shear free surfaces in a horizontal ...pipe. Shear free surfaces attenuate ...
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A critical-layer framework for turbulent pipe flow
... 1.3. Linear and nonlinear tools for analysis of the Navier–Stokes equations Other researchers, essentially forming a different community, have exploited tools from linear systems and dynamical systems theory, with a ...
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Similarity Solution Of Plane Turbulent Mixing Layer
... Mixing layer is responsible for most of the broad-band noise generated in propulsion ...Mixing layer possesses certain universal flow features that have made them very attractive for both ...
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Studies on Boundary Layer Parameters on Rough Surfaces in Turbulent Boundary Layer Zone
... boundary layer parameters are generally most of the help to study the different aspects and responses for flow properties or many more characteristics of a ...boundary layer parameters and their responses ...
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The rough favourable pressure gradient turbulent boundary layer
... The velocity field is measured using a two component LDA system. The system consists of a nearly vertical probe emitting four beams of light, two blue and two green, from an Argon-ion laser. A reduction of the control ...
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On the merging of turbulent spots in a supersonic boundary layer flow
... lateral shear and the spot destabil- isation process ...isolated turbulent spot, together with lateral and tandem merging of spots in a supersonic boundary layer have been studied in detail by ...
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On the properties of turbulent boundary layer over polar cusps
... one period in X is displayed). After ∼ 15 ion gyro-periods in the external field, the current sheet divides into reconnected X- and O-lines: in Fig. 6, one X-line and two halves of the O-lines are shown. Unlike MHD, in ...
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