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A New Method for Modeling Free Surfa...

Duke University.

A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications.
Author:	Lee, Curtis.
Published:	Ann Arbor : ProQuest Dissertations & Theses, 2016
Description:	183 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.
Notes:	Adviser: John Dolbow.
Contained By:	Dissertation Abstracts International77-12B(E).
Subject:	Ocean engineering.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10146282
ISBN:	9781369016444

A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications.
Lee, Curtis.

A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 183 p.

Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.

Thesis (Ph.D.)--Duke University, 2016.

The computational modeling of ocean waves and ocean-faring devices poses numerous challenges. Among these are the need to stably and accurately represent both the fluid-fluid interface between water and air as well as the fluid-structure interfaces arising between solid devices and one or more fluids. As techniques are developed to stably and accurately balance the interactions between fluid and structural solvers at these boundaries, a similarly pressing challenge is the development of algorithms that are massively scalable and capable of performing large-scale three-dimensional simulations on reasonable time scales. This dissertation introduces two separate methods for approaching this problem, with the first focusing on the development of sophisticated fluid-fluid interface representations and the second focusing primarily on scalability and extensibility to higher-order methods.

ISBN: 9781369016444Subjects--Topical Terms:

575501
Ocean engineering.

A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications.
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245 1 2 $a A New Method for Modeling Free Surface Flows and Fluid-Structure Interaction with Ocean Applications.
260 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 183 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.
500 $a Adviser: John Dolbow.
502 $a Thesis (Ph.D.)--Duke University, 2016.
520 $a The computational modeling of ocean waves and ocean-faring devices poses numerous challenges. Among these are the need to stably and accurately represent both the fluid-fluid interface between water and air as well as the fluid-structure interfaces arising between solid devices and one or more fluids. As techniques are developed to stably and accurately balance the interactions between fluid and structural solvers at these boundaries, a similarly pressing challenge is the development of algorithms that are massively scalable and capable of performing large-scale three-dimensional simulations on reasonable time scales. This dissertation introduces two separate methods for approaching this problem, with the first focusing on the development of sophisticated fluid-fluid interface representations and the second focusing primarily on scalability and extensibility to higher-order methods.
520 $a We begin by introducing the narrow-band gradient-augmented level set method (GALSM) for incompressible multiphase Navier-Stokes flow. This is the first use of the high-order GALSM for a fluid flow application, and its reliability and accuracy in modeling ocean environments is tested extensively. The method demonstrates numerous advantages over the traditional level set method, among these a heightened conservation of fluid volume and the representation of subgrid structures.
520 $a Next, we present a finite-volume algorithm for solving the incompressible Euler equations in two and three dimensions in the presence of a flow-driven free surface and a dynamic rigid body. In this development, the chief concerns are efficiency, scalability, and extensibility (to higher-order and truly conservative methods). These priorities informed a number of important choices: The air phase is substituted by a pressure boundary condition in order to greatly reduce the size of the computational domain, a cut-cell finite-volume approach is chosen in order to minimize fluid volume loss and open the door to higher-order methods, and adaptive mesh refinement (AMR) is employed to focus computational effort and make large-scale 3D simulations possible. This algorithm is shown to produce robust and accurate results that are well-suited for the study of ocean waves and the development of wave energy conversion (WEC) devices.
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