Zobrazeno 1 - 10
of 463
pro vyhledávání: '"Hof B"'
Autor:
Hof, B. van 't, Vuik, M. J.
Publikováno v:
Journal of Computational Science, Volume 36, September 2019, 101008
Symmetry-preserving (mimetic) discretization aims to preserve certain properties of a continuous differential operator in its discrete counterpart. For these discretizations, stability and (discrete) conservation of mass, momentum and energy are prov
Externí odkaz:
http://arxiv.org/abs/1901.02264
We show that a rather simple, steady modification of the streamwise velocity profile in a pipe can lead to a complete collapse of turbulence and the flow fully relaminarizes. Two different devices, a stationary obstacle (inset) and a device to inject
Externí odkaz:
http://arxiv.org/abs/1802.01331
Turbulence is the major cause of friction losses in transport processes and it is responsible for a drastic drag increase in flows over bounding surfaces. While much effort is invested into developing ways to control and reduce turbulence intensities
Externí odkaz:
http://arxiv.org/abs/1711.06543
Publikováno v:
J. Fluid Mech. 770, May 2015, R3
Transition to turbulence in straight pipes occurs in spite of the linear stability of the laminar Hagen--Poiseuille flow if the amplitude of flow perturbations as well as the Reynolds number exceed a minimum threshold (subcritical transition). As the
Externí odkaz:
http://arxiv.org/abs/1508.06559
Publikováno v:
Journal of Fluid Mechanics, Volume 738, January 2014, pp 463- 491
The flow instability and further transition to turbulence in a toroidal pipe (torus) with curvature (tube-to-coiling diameter) 0.049 is investigated experimentally. The flow inside the toroidal pipe is driven by a steel sphere fitted to the inner pip
Externí odkaz:
http://arxiv.org/abs/1508.06546
Starting with turbulence that explores a wide region in phase space, we discover several relative periodic orbits (RPOs) embedded within a subregion of the chaotic turbulent saddle. We also extract directly from simulation, several travelling waves (
Externí odkaz:
http://arxiv.org/abs/1501.01989
Publikováno v:
J. Fluid Mech. (2010), vol. 646, pp. 127-136
The onset of shear flow turbulence is characterized by turbulent patches bounded by regions of laminar flow. At low Reynolds numbers localized turbulence relaminarises, raising the question of whether it is transient in nature or it becomes sustained
Externí odkaz:
http://arxiv.org/abs/0907.3440
Akademický článek
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We report the results of an experimental investigation of the transition to turbulence in a pipe over approximately an order of magnitude range in $Re$. A novel scaling law is uncovered using a systematic experimental procedure which permits contact
Externí odkaz:
http://arxiv.org/abs/cond-mat/0306684
Akademický článek
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