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Investigations of two-phase flow in ...

Billica, Judith Anne.

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Investigations of two-phase flow in porous media using a total velocity-based numerical model.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Investigations of two-phase flow in porous media using a total velocity-based numerical model./
Author:	Billica, Judith Anne.
Description:	189 p.
Notes:	Source: Dissertation Abstracts International, Volume: 58-01, Section: B, page: 0313.
Contained By:	Dissertation Abstracts International58-01B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9719549
ISBN:	0591277549

Investigations of two-phase flow in porous media using a total velocity-based numerical model.
Billica, Judith Anne.

Investigations of two-phase flow in porous media using a total velocity-based numerical model. - 189 p.

Source: Dissertation Abstracts International, Volume: 58-01, Section: B, page: 0313.

Thesis (Ph.D.)--Colorado State University, 1996.

A total velocity-based, two-phase flow numerical model is presented to predict the movement of any two immiscible fluids in shallow, subsurface environments. The model simulates one-dimensional flow in homogeneous or two-layer soil systems and accommodates a variety of initial and boundary conditions. The model is based on a partial differential equation for volume conservation of water (combined with Darcy's law) and an integral equation for total velocity. Total velocity is the sum of the wetting fluid velocity (i.e. water) and nonwetting fluid velocity (i.e. air or an immiscible organic fluid) for two fluids present in a porous medium.

ISBN: 0591277549Subjects--Topical Terms:

783781
Engineering, Civil.

Investigations of two-phase flow in porous media using a total velocity-based numerical model.
LDR:03068nmm 2200289 4500 001 1814519
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020 $a 0591277549
035 $a (UnM)AAI9719549
035 $a AAI9719549
040 $a UnM $c UnM
100 1 $a Billica, Judith Anne. $3 1903983
245 1 0 $a Investigations of two-phase flow in porous media using a total velocity-based numerical model.
300 $a 189 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-01, Section: B, page: 0313.
502 $a Thesis (Ph.D.)--Colorado State University, 1996.
520 $a A total velocity-based, two-phase flow numerical model is presented to predict the movement of any two immiscible fluids in shallow, subsurface environments. The model simulates one-dimensional flow in homogeneous or two-layer soil systems and accommodates a variety of initial and boundary conditions. The model is based on a partial differential equation for volume conservation of water (combined with Darcy's law) and an integral equation for total velocity. Total velocity is the sum of the wetting fluid velocity (i.e. water) and nonwetting fluid velocity (i.e. air or an immiscible organic fluid) for two fluids present in a porous medium.
520 $a Simulations conducted with the model included infiltration without ponding in a fine over coarse soil and in a coarse over fine soil; ponded infiltration in a fine over coarse soil without air compression; flow of water and an immiscible organic fluid in a homogeneous, vertical soil column; and flow of water and an immiscible organic fluid in a two-layer porous medium. Water content profiles were plotted and mass balance was checked after each simulation. Model output for the water and air flow cases was compared to SWIM, a one-phase flow numerical model. The flow of water and an immiscible organic fluid was verified for homogeneous soils against exact integral solutions developed by others for horizontal, two-phase flow.
520 $a The water-air simulations for layered soils without ponding indicated that the water content profiles generated by the model were essentially identical to those generated by the one-phase flow SWIM model. However, the two-phase flow model provides information about the air phase that might be of value if the bulk air phase contains environmental contaminants. The two-phase flow model showed that the presence of a second layer can influence the direction of air flow during infiltration. For cases with ponding, the model showed that the presence of layers influences the time to ponding. Execution times for the two-layer, water-air system simulations were long, and convergence problems were encountered in several cases. The water-organic fluid system simulations were in agreement with physical expectations.
590 $a School code: 0053.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Hydrology. $3 545716
650 4 $a Engineering, Environmental. $3 783782
690 $a 0543
690 $a 0388
690 $a 0775
710 2 0 $a Colorado State University. $3 675646
773 0 $t Dissertation Abstracts International $g 58-01B.
790 $a 0053
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9719549