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Simulation of floating body motions ...

Kang, Chang-Ho.

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Simulation of floating body motions by interactive RANS/Laplace methods.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Simulation of floating body motions by interactive RANS/Laplace methods./
Author:	Kang, Chang-Ho.
Description:	187 p.
Notes:	Chair: Hamn-Ching Chen.
Contained By:	Dissertation Abstracts International59-08B.
Subject:	Engineering, Marine and Ocean. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9903151
ISBN:	9780599002579

Simulation of floating body motions by interactive RANS/Laplace methods.
Kang, Chang-Ho.

Simulation of floating body motions by interactive RANS/Laplace methods. - 187 p.

Chair: Hamn-Ching Chen.

Thesis (Ph.D.)--Texas A&M University, 1998.

A hybrid numerical method for the prediction of body-wave interactions including both viscous and nonlinear wave effects is presented. In this method, a chimera domain decomposition approach which combines a Laplace solver for nonlinear free surface waves and a Reynolds-Averaged Navier-Stokes (RANS) method is used. The potential flow Laplace solver provides the nonlinear waves away from the body. The RANS method in the near field resolves the turbulent boundary layers, the wake flows, and the nonlinear waves around the body boundary. The kinematic and dynamics free surface boundary conditions are satisfied on the exact free surface in both the RANS and potential flow solution domains. The viscous-inviscid interaction is captured through a direct matching of the velocity and pressure fields in an overlapped RANS and potential flow computational domain.

ISBN: 9780599002579Subjects--Topical Terms:

1019064
Engineering, Marine and Ocean.

Simulation of floating body motions by interactive RANS/Laplace methods.
LDR:02820nam 2200277 a 45 001 946967
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008 110523s1998 ||||||||||||||||| ||eng d
020 $a 9780599002579
035 $a (UMI)AAI9903151
035 $a AAI9903151
040 $a UMI $c UMI
100 1 $a Kang, Chang-Ho. $3 1270385
245 1 0 $a Simulation of floating body motions by interactive RANS/Laplace methods.
300 $a 187 p.
500 $a Chair: Hamn-Ching Chen.
500 $a Source: Dissertation Abstracts International, Volume: 59-08, Section: B, page: 4378.
502 $a Thesis (Ph.D.)--Texas A&M University, 1998.
520 $a A hybrid numerical method for the prediction of body-wave interactions including both viscous and nonlinear wave effects is presented. In this method, a chimera domain decomposition approach which combines a Laplace solver for nonlinear free surface waves and a Reynolds-Averaged Navier-Stokes (RANS) method is used. The potential flow Laplace solver provides the nonlinear waves away from the body. The RANS method in the near field resolves the turbulent boundary layers, the wake flows, and the nonlinear waves around the body boundary. The kinematic and dynamics free surface boundary conditions are satisfied on the exact free surface in both the RANS and potential flow solution domains. The viscous-inviscid interaction is captured through a direct matching of the velocity and pressure fields in an overlapped RANS and potential flow computational domain.
520 $a In the present study, the RANS equations for viscous (laminar and turbulent) flows and the Laplace equation for potential flows were formulated in an earth-fixed reference frame and transformed into general curvilinear, moving coordinate system. The grid velocity and fluid acceleration terms resulted from arbitrary grid movements have been incorporated in the numerical solution procedure. The numerical grid beneath the free surface was updated to conform with the exact free surface elevation. Furthermore, the free surface boundary conditions were applied on the exact free surface to ensure accurate prediction of the free surface water elevations. Calculations have been performed for a two-dimensional body in prescribed heave, sway, or roll motions to demonstrate the capability of the chimera RANS/Laplace method for time-domain simulation of nonlinear free surface waves around oscillating bodies. The numerical solutions successfully captured many important features of the transient flow induced by oscillating bodies including both viscous and nonlinear free surface effects.
590 $a School code: 0803.
650 4 $a Engineering, Marine and Ocean. $3 1019064
690 $a 0547
710 2 $a Texas A&M University. $3 718977
773 0 $t Dissertation Abstracts International $g 59-08B.
790 $a 0803
790 1 0 $a Chen, Hamn-Ching, $e advisor
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9903151