Results 71 to 80 of about 1,146 (113)
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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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On problems of the laminar–turbulent transition
Doklady Mathematics, 2016zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lukashev, E. A. +3 more
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Turbulence as a nonequilibrium phase transition
Theoretical and Mathematical Physics, 1992The transition from laminar to turbulent flow is studied on the basis of an exact equation for the averaged velocity and an approximate nonlinear equation for the Reynolds stress \(\tau\). The stationary state can be determined from the condition of minimum of a functional that is analogous to the Landau functional in the theory of phase transitions ...
Zubarev, D. N. +2 more
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Turbulent Transition in Solar Surges
Space Science Reviews, 1994It has been suggested that a surge can be modelled as a jet travelling in a sheared magnetic field, and that the transition to turbulence of this “MHD tearing jet” can explain several key observed features. In this paper we present our preliminary results of the transition to turbulencevia secondary instabilities of the MHD tearing jet.
R. B. Dahlburg, J. T. Karpen
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Transit times in turbulent flows
Physical Review E, 2010Statistics of the motion of passively convected point particles in turbulent flows are studied. The database used is obtained by direct numerical solution of the Navier-Stokes equation. We estimate the probability distribution of the transit times of such particles through reference volumes with given forms and sizes.
H L, Pécseli, J, Trulsen
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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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1987
In this chapter, we will consider some examples of flows undergoing what can be called a transition to turbulence. This transition will sometimes be characterized by a critical value of a non dimensional parameter depending on the actions or forces imposed upon the flow.
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In this chapter, we will consider some examples of flows undergoing what can be called a transition to turbulence. This transition will sometimes be characterized by a critical value of a non dimensional parameter depending on the actions or forces imposed upon the flow.
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2002
Abstract The years 1973–5, as has just been noted, led many observers to conclude that the world economy was on the brink of fundamen-tal and perhaps frightening change. In addition to the shocks induced by the oil price rise, there was talk of a ‘third industrial revolution’ resulting from the application of electronic technolo-gies and
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Abstract The years 1973–5, as has just been noted, led many observers to conclude that the world economy was on the brink of fundamen-tal and perhaps frightening change. In addition to the shocks induced by the oil price rise, there was talk of a ‘third industrial revolution’ resulting from the application of electronic technolo-gies and
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2017
This dissertation examines the implications of leadership change on political activism in authoritarian regimes. It asks and answers the question, “Why do some leader transitions induce significant societal activism while others pass without the commotion of contentious activities?” Previous research examines leadership succession as an elite-level ...
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This dissertation examines the implications of leadership change on political activism in authoritarian regimes. It asks and answers the question, “Why do some leader transitions induce significant societal activism while others pass without the commotion of contentious activities?” Previous research examines leadership succession as an elite-level ...
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