Transition and turbulence
Instability and transition to turbulence in a free shear layer affected by a parallel magnetic field
... We performed direct numerical simulations of the transition to turbulence resulting from the instability. Two types of initial conditions were considered. In both cases, the initial velocity field consisted ...
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Self-organization and transition to turbulence in isotropic fluid motion driven by negative damping at low wavenumbers
... One of the better known results in the history of science is the discovery of the laminar- turbulence transition in pipe fl ow by Osborne Reynolds in the late nineteenth century. Since then such transitions ...
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Universal continuous transition to turbulence in a planar shear flow
... the transition to turbu- lence and to determine whether or not subcritical shear flows follow the spatiotemporal scenario of directed ...of turbulence in a planar ...equilibrium turbulence fraction ...
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New Scenario for Transition to Slow 3 D Turbulence
... Analytical non-perturbative study of the three-dimensional nonlinear stochastic partial differen- tial equation with additive thermal noise, analogous to that proposed by V. N. Nikolaevskii [1]-[5] to describe ...
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An experimental study on laminar-turbulent transition at high free-stream turbulence in boundary layers with pressure gradients
... laminar-turbulent transition is particularly challenging task for turbulence ...of turbulence models are developed which claim possibility of transition prediction and none of them is proven ...
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The common physical origin of the glass transition, macromolecular entanglement and turbulence
... glass transition (GT)” ...of turbulence is the same as that of GT and macromolecular entangle- ment (ME) when solving GT and ME in polymer phys- ...localization transition and flow speedup along ...
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An optimization approach for analysing nonlinear stability with transition to turbulence in fluids as an exemplar
... the transition problem, on the other hand, is fully ...transient turbulence) forward in time using an ‘edge tracking’ technique [53, 101, ...so transition is most easily ...
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The influence of flow parameters on the transition to turbulence in pulsatile flow
... inlet. Transition can also be found at Reynolds numbers below 2000, if large disturbances are induced at the inlet by a grid or orifice plate [3], ...of turbulence in purely oscillatory flow with no mean ...
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Turbulent spectra and spectral kinks in the transition range from MHD to kinetic Alfv´en turbulence
... Alfv´enic turbulence spectrum in the MHD/kinetic transition range has a universal double-kink form (2-k ...the turbulence in the cross- field ...
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Simulation of Transitional Flow over an Elliptic Cone at Mach 8 using a One-Equation Transition/Turbulence Model
... Profile data from the purely laminar region was extracted from the initial runs of the transition/turbulence code in an effort to search for a better way to locate the boundary layer edge. The u-velocity ...
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Transition to magnetorotational turbulence in Taylor-Couette flow with imposed azimuthal magnetic field
... Despite this recent experimental progress in realizing magnetorotational instabilities in the laboratory, little is known about their bifurcation scenario, transition to turbulence and transport properties ...
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Review and Assessment of Turbulence Transition Models
... short transition length and over-predicted the peak heat transfer for some ...make transition occur at the desired position by varying the inlet ...triggering turbulence transition, a spot ...
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Percolation transition in the kinematics of nonlinear resonance broadening in Charney–Hasegawa–Mima model of Rossby wave turbulence
... Abstract. We study the kinematics of nonlinear resonance broadening of interacting Rossby waves as modelled by the Charney–Hasegawa–Mima equation on a biperiodic domain. We focus on the set of wave modes which can ...
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Turbulence closure: turbulence, waves and the wave-turbulence transition – Part 1: Vanishing mean shear
... the transition between internal waves and turbulence in Lagrangian drifter measurements, DL00 find some aspects of turbulence closures compatible with their results and encourage the development of ...
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Effect on flap transition of upstream wake turbulence
... the transition from laminar to turbulent boundary layer is not well ...of transition onset. Understanding and thereby predicting the transition onset is still a major challenge for the aerodynamics ...
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Flow structure in a model of aircraft trailing vortices
... box turbulence and channel ...the turbulence in each vortex, generated by the fast axial velocity related instabilities, de- creases significantly, relaminarization is not ...mixing transition was ...
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SST model, and the DES approach based on the SST k model. A comparison with
... Dynamic stall is characterised by the process of the shedding of LEV which carries a low pressure wave that sweeps chord-wise across the suction surface of the airfoil. This feature, as can be seen in Fig. 7, is well ...
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Structure Formation in Turbulent Plasmas
... plasma turbulence as being nonlinear, nonlocal, and statis- ...of turbulence, global sim- ulations, and methods of nonlinear data ...and transition, phase boundaries, transition probabilities, ...
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Progress of Full- f Gyrokinetic Simulation Toward Reactor Relevant Numerical Experiments
... (ITG) turbulence was first addressed using a δ f gyrokinetic particle code, and the transition of transport scaling from a Bohm like scaling to a gyro-Bohm like scaling was found for large ...
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Self sustaining process in Taylor Couette flow
... undergoes transition to three-dimensional turbulence despite being linearly stable at all Reynolds ...sustained turbulence and by Lemoult et al. [21] to establish that this transition was ...
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