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Kelvin-Helmholtz waves

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Series: GSA Special Papers
Published: 01 January 1982
DOI: 10.1130/SPE192-p55
... topographic obstacles. Gravity waves and turbulent mixing are associated with a downward transport of vertical momentum and occur in the region of accelerated windflow in the central Wyoming wind corridor. Kelvin-Helmholtz waves are prevalent in the area of hydraulic jump at Windy Gap. Understanding...
Journal Article
Journal: Geology
Published: 01 April 2010
Geology (2010) 38 (4): 303–306.
... of field observations in Lisan Formation sediments with numerical simulations showing similar stages of Kelvin-Helmholtz instability evolution from linear wave through asymmetric billows, coherent vortices, and fully turbulent breccia. Grid spacing on photos is 10 cm. Figure 3. The deformation...
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Journal Article
Journal: Geology
Published: 26 April 2018
Geology (2018) 46 (6): 551–554.
... flowing through their upper parts would result in pycnoclines between turbidity and contour currents, with amplitudes of up to 7.07 m. Such pycnoclines, in most cases, would produce Kelvin-Helmholtz billows and bores that had velocities of 0.87–1.48 m/s and prograded toward the steep channel flanks by 4.0...
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Journal Article
Published: 01 May 2002
Journal of Sedimentary Research (2002) 72 (3): 336–340.
... flows develop a lower region of reduced velocity that is separated from the overlying flow by a distinct shear layer. Large-scale Kelvin-Helmholtz instabilities are generated along this shear layer and dominate both turbulence production and fluid mixing. These experimental results are used to interpret...
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Journal Article
Published: 01 December 2011
Journal of Sedimentary Research (2011) 81 (12): 874–884.
... instability growth, similar to Kelvin-Helmholtz instabilities formed in Newtonian fluids. This constitutes the first observation of such features formed within granular fluids by motions within the vertical plane. The scale of the features and degree of mixing generated by them has implications...
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Journal Article
Journal: Geophysics
Published: 18 November 2015
Geophysics (2016) 81 (1): T1–T9.
... the bubble. The no-slip condition allowed the effect of skin-friction drag on the bubble to be captured, along with Kelvin-Helmholtz instabilities at the surface, which caused a change in the shape of the bubble during collapse. The influence of the no-slip condition suggests that it is important and should...
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Journal Article
Published: 01 April 2009
Journal of Sedimentary Research (2009) 79 (4): 162–183.
... in horizontal velocity and strong turbulence from an upper region of plug flow with a much gentler velocity gradient and lower turbulence intensity. Kelvin-Helmholtz shear instabilities within the highly turbulent shear layer are expressed as distinct second-scale oscillations in the time series of downstream...
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Series: Society of Exploration Geophysicists Distinguished Instructor Series, Society of Exploration Geophysicists Distinguished Instructor Series
Published: 01 January 2016
DOI: 10.1190/1.9781560803362.ch2
EISBN: 9781560803362
... Abstract In Chapter 2, an historical overview of the development of S-waves and VSP in the 20th century is presented. Early efforts focused on building strong S-wave sources; but after advancements in P-wave AVO and recognition of S-wave splitting, PS-waves began to dominate industry research...
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Journal Article
Published: 01 July 2004
Journal of Sedimentary Research (2004) 74 (4): 580–598.
... several processes, such as (1) the passage of several Kelvin-Helmholtz billows and then turbulent wakes, resulting from viscous shear at the upper surface of, respectively, the head and the body of turbulent flows ( Middleton 1993 ; Kneller and Buckee 2000 ), or (2) flow instabilities and/or temporal...
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Journal Article
Published: 27 August 2019
Journal of Sedimentary Research (2019) 89 (8): 808–814.
..., we propose that the surface waves prevent the largest-scale Kelvin-Helmholtz convection cells above the turbidity current from fully developing. By disrupting such macroturbulence, the surface waves effectively reduce the diffusivity of the turbidity current across its upper boundary and therefore...
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Journal Article
Published: 01 August 2015
Journal of Sedimentary Research (2015) 85 (8): 885–902.
... of any turbidity current as part of the KelvinHelmholtz instabilities, the occurrence of basal flow reversals in a turbidity current is related to the presence of confining topography. Waves are manifested both in the vertical and the horizontal component of the velocity field, and they describe...
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Journal Article
Published: 06 October 2015
Journal of the Geological Society (2016) 173 (1): 12–45.
... the top of the viscous sublayer. This phase of turbulence enhancement at low fine-sediment concentrations is linked to shear occurring at the edge of the growing viscous sublayer, on which KelvinHelmholtz instabilities are generated. This situation thus provides a thickened region of low velocity near...
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Journal Article
Published: 01 October 2005
Bulletin of the Seismological Society of America (2005) 95 (5): 1916–1927.
... the correction term by taking advantage of the simple shape of the triangle elements. To do so, let us introduce the Kelvin fundamental solution 11 and note , the stress tensor associated with solution . It is noticed that the Helmholtz and Kelvin solutions have identical singularities: 12...
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Journal Article
Published: 01 April 2010
American Mineralogist (2010) 95 (4): 563–573.
... matrix at Γ point, acoustic modes were obtained by solving the non-zero components of the strain matrix. Following the Kieffer model, acoustic branches were assumed to follow sine wave dispersion when traveling within the Brillouin zone. All thermodynamic properties that depend on vibrational frequencies...
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Journal Article
Published: 10 November 2015
Bulletin of the Seismological Society of America (2015) 105 (6): 3180–3188.
... should generally satisfy Q K <3.6 Q μ . Second, the relation between Q K and Q μ may depend on the wave modes in which these quantities are measured. Knopoff (1964) observed that in mantle surface waves, Q K may be lower than Q S despite Q K ≫ Q μ in free oscillations. Third, many observations...
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Series: Investigations in Geophysics
Published: 01 January 2005
DOI: 10.1190/1.9781560801719.ch7
EISBN: 9781560801719
... is provided using a Kelvin-Voigt medium. A body wave is a propagating disturbance that can exist in an unbounded medium. Basic results for body waves in linearly elastic and linearly viscoelastic media are summarized here but only for homogeneous and isotropic media to keep...
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Image
Spectrum of flow types, following terminology and schematic illustrations o...
Published: 01 December 2011
layer with turbulence decreasing away from the bed. D) Quasi-laminar plug flow under high SSC conditions. A well-developed plug of cohesive sediment is separated from the bed by a zone of strong laminar shear. K-H refers to the possible presence of Kelvin-Helmholtz waves on an interface. In parts C
Image
Comparison of field observations in Lisan Formation sediments with numerica...
in > Geology
Published: 01 April 2010
Figure 2. Comparison of field observations in Lisan Formation sediments with numerical simulations showing similar stages of Kelvin-Helmholtz instability evolution from linear wave through asymmetric billows, coherent vortices, and fully turbulent breccia. Grid spacing on photos is 10 cm.
Journal Article
Journal: Geophysics
Published: 01 January 2006
Geophysics (2006) 71 (1): 13JF–29JF.
... papers covering recent developments of the theory of seismic wave propagation in anisotropic media and its various applications to seismic exploration. © 2006 Society of Exploration Geophysicists. All rights reserved. 2006 We consider the following question: when is it possible to tell...
Journal Article
Journal: Geophysics
Published: 21 December 2018
Geophysics (2019) 84 (1): F1–F15.
... and Kristek, 2005 ; Cao and Yin, 2014 ), and their fractional extensions such as the fractional Kelvin model and fractional Zener model ( Rossikhin and Shitikova, 2010 ; Näsholm and Holm, 2013 ). In general, the attenuation of seismic waves appears to be adequately modeled by a power law ( Strick, 1967...
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