Results 261 to 270 of about 245,469 (326)
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International Journal for Numerical Methods in Engineering, 2011
A. Uranga +3 more
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Physics Today, 1978
Fluid flows have been studied systematically for more than a century and their equations of motion are well known, yet the transition from laminar flow to turbulent flow remains an enigma. The difficulty lies in the intractability of the nonlinear hydrodynamic equations that express the conservation of mass, momentum and energy for a fluid continuum ...
Swinney, Harry L., Gollub, Jerry P.
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Fluid flows have been studied systematically for more than a century and their equations of motion are well known, yet the transition from laminar flow to turbulent flow remains an enigma. The difficulty lies in the intractability of the nonlinear hydrodynamic equations that express the conservation of mass, momentum and energy for a fluid continuum ...
Swinney, Harry L., Gollub, Jerry P.
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Transitions to turbulence in helium gas
Physical Review A, 1987Experimental study in gaseous helium at low temperature (4 K) of thermal convection up to a Rayleigh number $R={10}^{11}$. Three regimes are observed, a chaotic state up to $R=2.5\ifmmode\times\else\texttimes\fi{}{10}^{5}$, a soft-turbulence state up to $R=4\ifmmode\times\else\texttimes\fi{}{10}^{7}$, and then a hard-turbulence state.
, Heslot, , Castaing, , Libchaber
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Transition from tokamak to stellarator turbulence
Plasma Physics and Controlled Fusion, 2000We report on the first direct numerical simulation of drift-Alfven wave turbulence in three-dimensional magnetic field geometries. It is found that the local metric has significant influence on instability and transport and that local shear contributes as the principal damping mechanism in low-global-shear field configurations.
Kendl, A., Scott, B., Wobig, H.
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2001
We have spent several chapters discussing various type of instabilities in a number of flow situations. In this final chapter we will consider how these instabilities may trigger laminar-turbulent transition. The transition process is often complicated and can follow many possible routes.
Peter J. Schmid, Dan S. Henningson
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We have spent several chapters discussing various type of instabilities in a number of flow situations. In this final chapter we will consider how these instabilities may trigger laminar-turbulent transition. The transition process is often complicated and can follow many possible routes.
Peter J. Schmid, Dan S. Henningson
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Transition to Turbulence in Pipe Flow
Journal of Low Temperature Physics, 2006We review the results of recent experimental investigations into transition to turbulence in fluid flow through a circular straight pipe, at room temperature. The stability of Hagen - Poiseuille flow was investigated using impulsive perturbations by either injecting or sucking small amounts of fluid through holes in the wall of the pipe.
Mullin, Tom, Peixinho, J.
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New Scenario for Transition to Turbulence?
Physical Review Letters, 1996Numerical study of the one-dimensional nonlinear partial differential equation, equivalent to that proposed [Recent Advances in Engineering Science (Springer-Verlag, Berlin, 1989)] to describe longitudinal seismic waves, is presented. The equation has a threshold of short-wave instability and symmetry, providing slow long-wave dynamics.
, Tribelsky, , Tsuboi
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Transition to turbulence via spatio-temporal intermittency
Physical Review Letters, 1987The study of low-dimensional dissipative dynamical systems has provided a reasonable understanding of the transition to temporal chaos in strongly confined systems for which the spatial structure can be considered as frozen. The situation is still less advanced for weakly confined systems where chaos has both a spatial and a temporal meaning.
, Chaté, , Manneville
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Subharmonic transition to turbulence in channel flow
Applied Scientific Research, 1993A direct numerical simulation of subharmonic transition to turbulence in channel flow has been performed. The stages of primary and secondary instability have been identified in the results leading to a staggered pattern of A-shaped vortices. The associated staggered symmetry has been found to persist up to rather late stages of the breakdown process ...
Härtel, C., Kleiser, L.
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Directed percolation and the transition to turbulence
Nature Reviews Physics, 2022B. Hof
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