Results 51 to 60 of about 6,551 (166)
New Findings by High-Order DNS for Late Flow Transition in a Boundary Layer
Modelling and Simulation in Engineering, 2011 This paper serves as a summary of new discoveries by DNS for late stages of flow transition in a boundary layer. The widely spread concept “vortex breakdown” is found theoretically impossible and never happened in practice.
Chaoqun Liu, Lin Chen, Ping Lu
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Helicity in axisymmetric vortex breakdown
, 2018 Vortex breakdown phenomena in the axial vortices is an important feature which occurs frequently in geophysical flows (tornadoes and hurricanes) and in engineering flows (flow past delta wings, Von-Kerman vortex dynamo). We analyze helicity for axisymmetric vortex breakdown and propose a simplified formulation.
Sharma, Manjul, Sameen, A
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Applied SciencesLaser-induced breakdown spectroscopy (LIBS), limited by matrix effects, self-absorption in complex samples, and ambient atmospheric influences, still requires further improvement in detection sensitivity and signal stability. In this work, the excitation
Yuxia Zhou +5 more
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Evidence for long-lived polar vortex air in the mid-latitude summer stratosphere from in situ laser diode CH4 and H2O measurements [PDF]
Atmospheric Chemistry and Physics, 2005 A balloon borne diode laser spectrometer was launched in southern France in June 2000 to yield in situ stratospheric CH4 and H2O measurements. In the altitude region ranging from 20km to 25km, striking large spatial structures were observed in the ...
G. Durry, G. Durry, A. Hauchecorne
doaj
Characterization of Swirling Flows in a Partly Open Cylinder
Journal of Applied Fluid Mechanics, 2016 A partly open vertical disk-cylinder system, with an annular top lid, is used to model numerically the characteristics of axisymmetric swirling flows with stagnation and associated flows reversal; commonly referred to as vortex breakdown.
Malika Imoula +3 more
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Forced and Periodic Vortex Breakdown
Journal of Basic Engineering, 1967 The results of an experimental study of the forced and periodic breakdown of a confined vortex rotating in the opposite direction are presented. The vortex tube consists of two chambers connected by a short conduit through streamlined transitions. The upstream end is closed by a plain wall, and a circular orifice is provided at the downstream end.
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Vortex breakdown and turbulence
33rd Aerospace Sciences Meeting and Exhibit, 1995 openaire +2 more sources
Soliton-like coherent structures: a key to opening the door to turbulence. [PDF]
Natl Sci RevChen S, Deng X, Lee C.
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Generation of a 28 GHz annular power distribution with high power gyrotron and its application to microwave driven in tube accelerator. [PDF]
Sci RepTakahashi M +4 more
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Computational analysis of tandem floating wind turbines under coupled pitch surge motion comparing NREL 5 MW And IEA 22 MW. [PDF]
Sci RepXie B +7 more
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