Main Title |
Influence of Capillarity on the Flow of Water and Air in a Porous Medium. |
Author |
Adria, Donald Dean ;
|
CORP Author |
Stanford Univ., Calif. Dept. of Civil Engineering. |
Year Published |
1964 |
Report Number |
TR-38; PHS-WP-00246; |
Stock Number |
PB-216 216 |
Additional Subjects |
( Hydrogeology ;
Gas flow) ;
( Ground water recharge ;
Gas flow) ;
Compression ;
Mathematical models ;
Theses ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-216 216 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
170p |
Abstract |
In the usual analysis of the flow of water into a porous medium, such as infiltration into a soil, air resistance is neglected. Obviously as water moves into the air-filled pores air must be driven out. In most cases the air flows with a negligible resistance compared to the resistance of water to flow. However, if the air escape route deeper into the medium is blocked by an impermeable barrier, the air will be trapped and its pressure will increase as the combined action of gravity and capillary forces try to force the air from the pores. This air pressure build-up will decrease the infiltration rate below the rate predicted from measurements of the permeability of the medium and its capillary characteristics. The report presents a mathematical analysis of this effect. |
NTIS Title Notes |
Technical rept.. |
PUB Date Free Form |
Jun 64, |
Category Codes |
8H; 64H |
NTIS Prices |
PC E06/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326546082 |
Origin |
NTIS |
Type |
CAT |