Cavitation during desaturation of porous media under tension

Dani Or, Markus Tuller

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A potential mechanism for liquid drainage in wet porous media based on cavitation of water (the spontaneous formation of water vapor bubbles) under tension is proposed. Cavitation theory applied to an idealized pore predicts considerable differences in drainage branches of characteristic curves determined under tension and with imposed positive pressure. A potentially important aspect of cavitation is the possibility of liquid displacement (drainage) even in the absence of a continuous gaseous phase. Surface heterogeneity and impurities in soil and rock water are conducive for lowering cavitation tension threshold; on the other hand, small pore sizes and viscous resistance to flow restrain cavitation in natural porous media. The significance of cavitation in flow and transport processes is yet unknown; however, there are two important aspects to this phenomenon: (1) it may require revision of several conceptual models for liquid retention and displacement in porous media, and (2) extrapolating from evidence in plant xylem systems, cavitation may play an important role in determining the unsaturated hydraulic conductivity function.

Original languageEnglish (US)
Pages (from-to)191-194
Number of pages4
JournalWater Resources Research
Volume38
Issue number5
StatePublished - May 2002
Externally publishedYes

Fingerprint

cavitation
porous media
Cavitation
Porous materials
porous medium
drainage
liquids
unsaturated hydraulic conductivity
soil transport processes
Drainage
bubbles
water vapor
xylem
liquid
water
rocks
Liquids
Water
Hydraulic conductivity
Steam

Keywords

  • Cavitation
  • Soil water characteristics
  • Tension
  • Unsaturated porous media

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Aquatic Science
  • Water Science and Technology

Cite this

Cavitation during desaturation of porous media under tension. / Or, Dani; Tuller, Markus.

In: Water Resources Research, Vol. 38, No. 5, 05.2002, p. 191-194.

Research output: Contribution to journalArticle

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