Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Pringle, Chris C. T."'
We present a unique pipe flow rig capable where simultaneous particle tracking and flow velocity measurements in a dilute, neutrally buoyant particulate pipe flow in regimes of transition to turbulence. The flow consists of solid glass spheres for th
Externí odkaz:
http://arxiv.org/abs/1905.12460
We tackle the question of whether the presence of particles in a pipe flow can influence the linear transient growth of infinitesimal perturbations, in view of better understanding the behaviour of particulate pipe flows in regimes of transition to t
Externí odkaz:
http://arxiv.org/abs/1903.10389
In tokamak plasmas, sheared flows perpendicular to the driving temperature gradients can strongly stabilize linear modes. While the system is linearly stable, regimes with persistent nonlinear turbulence may develop, i.e. the system is subcritical. A
Externí odkaz:
http://arxiv.org/abs/1802.08519
In many plasma systems, introducing a small background shear flow is enough to stabilize the system linearly. The nonlinear dynamics are much less sensitive to sheared flows than the average linear growthrates, and very small amplitude perturbations
Externí odkaz:
http://arxiv.org/abs/1708.03565
A new, fully-localised, energy growth optimal is found over large times and in long pipe domains at a given mass flow rate. This optimal emerges at a threshold disturbance energy below which a nonlinear version of the known (streamwise-independent) l
Externí odkaz:
http://arxiv.org/abs/1408.1414
Minimal seeds for shear flow turbulence: using nonlinear transient growth to touch the edge of chaos
We propose a general strategy for determining the minimal finite amplitude isturbance to trigger transition to turbulence in shear flows. This involves constructing a variational problem that searches over all disturbances of fixed initial amplitude,
Externí odkaz:
http://arxiv.org/abs/1109.2459
Linear transient growth analysis is commonly used to suggest the structure of disturbances which are particularly efficient in triggering transition to turbulence in shear flows. We demonstrate that the addition of nonlinearity to the analysis can su
Externí odkaz:
http://arxiv.org/abs/1009.0628
Two approaches to the problem of transition to turbulence of shear flows are popular in the literature. The first is the linear one of transient growth which focuses on the likely form of the most 'dangerous' (lowest energy) turbulence-triggering dis
Externí odkaz:
http://arxiv.org/abs/1005.1479
Publikováno v:
Philosophical Transactions: Mathematical, Physical and Engineering Sciences, 2009 Feb . 367(1888), 457-472.
Externí odkaz:
https://www.jstor.org/stable/40485452
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