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A three-dimensional numerical model ...

Damjanac, Branko.

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A three-dimensional numerical model of water flow in a fractured rock mass.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A three-dimensional numerical model of water flow in a fractured rock mass./
Author:	Damjanac, Branko.
Description:	222 p.
Notes:	Adviser: Charles Fairhurst.
Contained By:	Dissertation Abstracts International57-02B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9619264

A three-dimensional numerical model of water flow in a fractured rock mass.
Damjanac, Branko.

A three-dimensional numerical model of water flow in a fractured rock mass. - 222 p.

Adviser: Charles Fairhurst.

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

The research described in this thesis has focussed on the development of a fully three-dimensional, hydro-mechanical, coupled analysis of fluid flow through a system of deformable joints in an assembly of solid blocks (formed by the intersection of the joint systems) in a rock mass. The three-dimensional Discrete Element Code (3DEC) has been extended to allow simulation of fluid flow through deformable joints in the three-dimensional solid.Subjects--Topical Terms:

783781
Engineering, Civil.

A three-dimensional numerical model of water flow in a fractured rock mass.
LDR:03254nam 2200325 a 45 001 969275
005 20110920
008 110921s1996 eng d
035 $a (UnM)AAI9619264
035 $a AAI9619264
040 $a UnM $c UnM
100 1 $a Damjanac, Branko. $3 1293329
245 1 2 $a A three-dimensional numerical model of water flow in a fractured rock mass.
300 $a 222 p.
500 $a Adviser: Charles Fairhurst.
500 $a Source: Dissertation Abstracts International, Volume: 57-02, Section: B, page: 1276.
502 $a Thesis (Ph.D.)--University of Minnesota, 1996.
520 $a The research described in this thesis has focussed on the development of a fully three-dimensional, hydro-mechanical, coupled analysis of fluid flow through a system of deformable joints in an assembly of solid blocks (formed by the intersection of the joint systems) in a rock mass. The three-dimensional Discrete Element Code (3DEC) has been extended to allow simulation of fluid flow through deformable joints in the three-dimensional solid.
520 $a The solid model consists of a dense system of three-dimensional blocks which interact mechanically along the interfaces, and which can slip and separate. The narrow interfaces (joints) between the blocks are filled with fluid, which flows under the action of the pressure field. Flow in the joints is assumed to be laminar--flow in the solid matrix of the rock is neglected.
520 $a The topology and geometry of the flow model are developed on the assumption that the solid blocks are densely packed. The flow model has two levels of geometrical representation: (i) representation by geometrical elements and, (ii) the discretized model. The geometrical elements of the flow model are: (i) flow planes, (ii) flow pipes and, (iii) flow knots.
520 $a Numerical solution of transient flow is accomplished using a "time-marching" finite difference technique. Evolution of the pore pressure in the model is controlled at collocation points located at the intersections between flow planes. Transient fluid flow in each (variable aperture) flow plane is solved using a boundary element technique combined with radial base interpolators. Pressures at the collocation points are iterated until continuity of flow is achieved, i.e. until the unbalanced flow from all flow planes connected to the collocation point becomes less than a predefined maximum.
520 $a As noted above, the model simulates coupled processes. A partitioned, staggered approach to solution of the coupled processes has been introduced. The appealing feature of this numerical technique is the modular approach to solution of a problem--a drawback is that partitioned numerical methods are not unconditionally stable. Conditions for convergence of three different partitioned numerical schemes are analyzed in terms of a critical flow time step, critical mechanical time step (during dynamic relaxation) and relaxation parameters.
590 $a School code: 0130.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Engineering, Petroleum. $3 1018448
650 4 $a Geology. $3 516570
690 $a 0372
690 $a 0543
690 $a 0765
710 2 0 $a University of Minnesota. $3 676231
773 0 $t Dissertation Abstracts International $g 57-02B.
790 $a 0130
790 1 0 $a Fairhurst, Charles, $e advisor
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9619264