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RECORD NUMBER: 58 OF 132

OLS Field Name OLS Field Data
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 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
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