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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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Turbulence Transition in Pipe Flow
Annual Review of Fluid Mechanics, 2007Pipe flow is a prominent example among the shear flows that undergo transition to turbulence without mediation by a linear instability of the laminar profile. Experiments on pipe flow, as well as plane Couette and plane Poiseuille flow, show that triggering turbulence depends sensitively on initial conditions, that between the laminar and the ...
Eckhardt, B. +3 more
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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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1977
Our knowledge of the development from the first instability of a boundary layer, described in Section 18.5, to the fully turbulent motion that ultimately results comes mainly from experimental investigations. Many of the experiments have used the vibrating ribbon technique (Section 18.5).
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Our knowledge of the development from the first instability of a boundary layer, described in Section 18.5, to the fully turbulent motion that ultimately results comes mainly from experimental investigations. Many of the experiments have used the vibrating ribbon technique (Section 18.5).
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Adjoint-based aerodynamic shape optimization including transition to turbulence effects
Aerospace Science and Technology, 2020Gustavo Luiz Olichevis Halila +2 more
exaly
Small-Scale Atmospheric Turbulence and Its Impact on Laminar-to-Turbulent Transition
AIAA Journal, 2021Amandine Guissart +2 more
exaly