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Fuzzy logic based nonlinear blending hybrid control of a kestrel-inspired ornithopter operating in sinusoidal and dryden gusts. [PDF]

Sci Rep
Abbasi SH, Saudagar AKJ, Nouman A, Hennache ML.   +3 more
europepmc   +1 more source

A Model for Dry Deposition of Atmospheric Micro- and Nanoplastic Fibers. [PDF]

Environ Sci Technol Lett
Foroutan H.
europepmc   +1 more source

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Transition Toward Developed Turbulence

Physical Review Letters, 1994
Using an axisymmetric jet with helium at low temperatures we have studied the velocity intermittency on a large range of Taylor scale based Reynolds number Rλ. The results show for the first time evidence for a transition between two types of turbulence in a jet. Above the transition (Rλ>180) a clear separation occurs between small and large scales: in
Chabaud, B., Naert, Antoine, Peinke, J., Chillà, F., Castaing, B., Hébral, B.   +5 more
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Laminar-Turbulent Transition and Turbulence

2014
The state of the boundary layer, laminar or turbulent, influences the drag, the performance of the wing, of stabilization and control devices etc., and the flight characteristics of an airplane. A given flight vehicle is considered as “transition insensitive”, if the location of laminar-turbulent transition does not affect these items.
Ernst Heinrich Hirschel, Jean Cousteix, Wilhelm Kordulla   +2 more
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The transition to turbulence

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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On problems of the laminar–turbulent transition

Doklady Mathematics, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lukashev, E. A., Yakovlev, N. N., Radkevich, E. V., Vasil'yeva, O. A.   +3 more
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Turbulence as a nonequilibrium phase transition

Theoretical and Mathematical Physics, 1992
The 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., Morozov, V. G., Troshkin, O. V.   +2 more
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Transition to Turbulence

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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Turbulent Transition in Solar Surges

Space Science Reviews, 1994
It 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, 2010
Statistics 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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