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Numerical modeling of turbidity curr...

Bradford, Scott F.

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Numerical modeling of turbidity current hydrodynamics and sedimentation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Numerical modeling of turbidity current hydrodynamics and sedimentation./
Author:	Bradford, Scott F.
Description:	220 p.
Notes:	Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3898.
Contained By:	Dissertation Abstracts International57-06B.
Subject:	Hydrology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9635490

Numerical modeling of turbidity current hydrodynamics and sedimentation.
Bradford, Scott F.

Numerical modeling of turbidity current hydrodynamics and sedimentation. - 220 p.

Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3898.

Thesis (Ph.D.)--University of Michigan, 1996.

An original model based upon mathematical theory and coupled with numerical methods has been developed in an effort to quantify and describe some of the aspects of submarine channel and fan development. The foundation of the model consists of the two-dimensional, vertically-integrated, time-dependent equations of turbidity currents which are based upon the laws of flow volume, momentum, and sediment conservation. The model has been extended to include nonuniform sediment and the most advanced, empirically-based expressions are implemented for model closure. In addition, a continuity equation for the bed sediment is solved in order to track bed development.Subjects--Topical Terms:

545716
Hydrology.

Numerical modeling of turbidity current hydrodynamics and sedimentation.
LDR:03358nam 2200313 4500 001 1403431
005 20111118095918.5
008 130515s1996 ||||||||||||||||| ||eng d
035 $a (UMI)AAI9635490
035 $a AAI9635490
040 $a UMI $c UMI
100 1 $a Bradford, Scott F. $3 1682690
245 1 0 $a Numerical modeling of turbidity current hydrodynamics and sedimentation.
300 $a 220 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-06, Section: B, page: 3898.
500 $a Co-Chairmen: Nikolaos Katopodes; Gary Parker.
502 $a Thesis (Ph.D.)--University of Michigan, 1996.
520 $a An original model based upon mathematical theory and coupled with numerical methods has been developed in an effort to quantify and describe some of the aspects of submarine channel and fan development. The foundation of the model consists of the two-dimensional, vertically-integrated, time-dependent equations of turbidity currents which are based upon the laws of flow volume, momentum, and sediment conservation. The model has been extended to include nonuniform sediment and the most advanced, empirically-based expressions are implemented for model closure. In addition, a continuity equation for the bed sediment is solved in order to track bed development.
520 $a A total variation diminishing (TVD) finite volume method has been utilized for solving the aforementioned system equations. Predictor-corrector time stepping is employed along with a monotone, upstream scheme for conservation laws (MUSCL) extrapolation of state variables to obtain a second-order scheme. Flux limiting is used to prevent the development of spurious oscillations. This is a state-of-the-art method that has been widely used by aerospace researchers, and has recently been implemented by hydrodynamicists to solve the shallow-water equations. The model has been modified to allow for the simulation of turbidity surges over a bed covered with ambient fluid only. This is analogous to the "dry-bed" dam-break problem associated with the shallow-water equations and requires special treatment. The behavior and accuracy of this modification are examined through theoretical reasoning and numerical experiments.
520 $a Analytical solutions utilizing characteristic theory are developed as an original effort and used for verification of the numerics of the model. Verification of the sedimentation aspects of the model is accomplished by comparing numerical predictions with experimental data. In addition, the model is used to perform numerical experiments in an attempt to describe the behavior of turbidity currents and bed evolution under varying environments and boundary conditions. In addition, other phenomena are investigated such as aggradation, avulsion, and the channelization of deposits in a submarine environment. Finally, two applications of the model to cases in which field data are available are presented in order to demonstrate the ability of the model to simulate flow events in a natural setting.
590 $a School code: 0127.
650 4 $a Hydrology. $3 545716
650 4 $a Engineering, Civil. $3 783781
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0388
690 $a 0543
690 $a 0548
710 2 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 57-06B.
790 1 0 $a Katopodes, Nikolaos, $e advisor
790 1 0 $a Parker, Gary, $e advisor
790 $a 0127
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9635490