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One‐dimensional subsurface transport of a nonaqueous phase liquid containing sparingly water soluble organics: A front‐tracking model
Author(s) -
Ryan Patrick A.,
Cohen Yoram
Publication year - 1991
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/91wr00128
Subject(s) - penetration (warfare) , multiphase flow , froude number , front (military) , phase (matter) , capillary action , reynolds number , aqueous two phase system , chemistry , mechanics , flow (mathematics) , chemical engineering , materials science , geology , organic chemistry , composite material , engineering , physics , oceanography , turbulence , operations research
A one‐dimensional multiphase mass transport model for the migration of a nonaqueous phase liquid (NAPL) containing sparingly water soluble organics in the unsaturated soil zone is described. The multiphase NAFL transport (MUNT) model consists of a two‐phase immiscible flow model linked to a four‐phase chemical transport model. The immiscible flow model incorporates a front‐tracking algorithm to determine the front of the invading NAPL as a function of penetration time. The NAPL penetration toward ground water is shown to be a function of four diniensionless groups: NAPL capillary number, the ratio of the NAPL Reynolds number to the NAPL Froude number, and the ratio of the defending phase to NAPL phase densities and viscosities. Simulations for the migration of organic chemicals show that their concentration in the air and aqueous phases past the front can be significant.