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Energetics and dynamics of internal ...

Venayagamoorthy, Subhas Karan.

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Energetics and dynamics of internal waves on a shelf break using numerical simulations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Energetics and dynamics of internal waves on a shelf break using numerical simulations./
Author:	Venayagamoorthy, Subhas Karan.
Description:	139 p.
Notes:	Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6653.
Contained By:	Dissertation Abstracts International67-11B.
Subject:	Physical Oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242630
ISBN:	9780542984556

Energetics and dynamics of internal waves on a shelf break using numerical simulations.
Venayagamoorthy, Subhas Karan.

Energetics and dynamics of internal waves on a shelf break using numerical simulations. - 139 p.

Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6653.

Thesis (Ph.D.)--Stanford University, 2006.

The subject of internal waves interacting with bottom topographic features in the ocean has received much attention in the past few decades. This is mainly attributed to a proposition that instabilities and breaking of internal waves at boundaries can be a significant source of turbulence, leading to mixing and transport in the ocean. The goal of this dissertation is to use two- and three-dimensional high resolution laboratory-scale numerical simulations to study the energetics and dynamics of internal waves as they interact with a shelf break in a linearly stratified fluid. The objectives are two-fold: first, to obtain an understanding of the partitioning of the incident internal wave energy over the course of the interaction process. Secondly, to explain the fate of the nonlinear internal waves that propagate onshore as a result of the interaction process.

ISBN: 9780542984556Subjects--Topical Terms:

1019163
Physical Oceanography.

Energetics and dynamics of internal waves on a shelf break using numerical simulations.
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100 1 $a Venayagamoorthy, Subhas Karan. $3 1923604
245 1 0 $a Energetics and dynamics of internal waves on a shelf break using numerical simulations.
300 $a 139 p.
500 $a Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6653.
500 $a Adviser: Oliver B. Fringer.
502 $a Thesis (Ph.D.)--Stanford University, 2006.
520 $a The subject of internal waves interacting with bottom topographic features in the ocean has received much attention in the past few decades. This is mainly attributed to a proposition that instabilities and breaking of internal waves at boundaries can be a significant source of turbulence, leading to mixing and transport in the ocean. The goal of this dissertation is to use two- and three-dimensional high resolution laboratory-scale numerical simulations to study the energetics and dynamics of internal waves as they interact with a shelf break in a linearly stratified fluid. The objectives are two-fold: first, to obtain an understanding of the partitioning of the incident internal wave energy over the course of the interaction process. Secondly, to explain the fate of the nonlinear internal waves that propagate onshore as a result of the interaction process.
520 $a We present results using two- and three-dimensional highly resolved simulations as a first step toward reaching our goals. We employ an analysis of the distribution of the energy flux across the shelf break taking into account the contributions from nonhydrostatic as well as nonlinear effects to quantify the percentage of energy flux that is transmitted onto the shelf, as well as percentages of reflected and dissipated energy fluxes, from an incoming wave field. For a given frequency of an incoming wave, we vary the amplitude of the wave to vary the incident energy flux, and we simulate conditions ranging from subcritical to supercritical slopes by varying the topographic slope angle. The results show that the cumulative transmitted energy flux is a strong function of the ratio of the topographic slope, gamma, to the wave characteristic slope, s, whilst the reflected energy is a strong function of both gamma/s and nonlinearity. We present results that provide insights into the dynamics of the interaction process with particular emphasis on the formation, structure and propagation of internal boluses onshelf.
520 $a This dissertation aims to contribute to a better understanding of the small-scale physics of internal waves interacting with topography. The results from this study have lead to some new insights regarding the energetics and dynamics of internal waves.
590 $a School code: 0212.
650 4 $a Physical Oceanography. $3 1019163
650 4 $a Engineering, Civil. $3 783781
650 4 $a Engineering, Environmental. $3 783782
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710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 67-11B.
790 1 0 $a Fringer, Oliver B., $e advisor
790 $a 0212
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3242630