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Title: Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media

Abstract

Foam has the potential to effectively carry and distribute either aqueous or gaseous amendments to the deep vadose zone for contaminant remediation. However, the transport of foam in porous media is complicated because flow characteristics such as the effective viscosity are affected not only by foam properties but also by the sediment properties and flow conditions. We determined the average effective foam viscosity via a series of laboratory experiments and found that the effective foam viscosity increased with the liquid fraction in foam, the injection rate, and sediment permeability. These impacts are quantified with an empirical expression, which is further demonstrated with data from literature. The results show that the liquid fraction in foam and sediment permeability are two primary factors affecting effective foam viscosity. These results suggest that, when foam is used in deep vadose zone remediation, foam flow will not suffer from gravitational drainage and can distribute amendments uniformly in heterogeneous sediments.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1060662
Report Number(s):
PNNL-SA-87925
EY4049110
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Vadose Zone Journal, 11(4)
Additional Journal Information:
Journal Name: Vadose Zone Journal, 11(4)
Country of Publication:
United States
Language:
English
Subject:
Deep Vadoze Zone; Remediation

Citation Formats

Zhang, Z. F., Zhong, Lirong, White, Mark D., and Szecsody, James E. Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media. United States: N. p., 2012. Web. doi:10.2136/vzj2011.0190.
Zhang, Z. F., Zhong, Lirong, White, Mark D., & Szecsody, James E. Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media. United States. doi:10.2136/vzj2011.0190.
Zhang, Z. F., Zhong, Lirong, White, Mark D., and Szecsody, James E. Thu . "Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media". United States. doi:10.2136/vzj2011.0190.
@article{osti_1060662,
title = {Experimental Investigation of the Effective Foam Viscosity in Unsaturated Porous Media},
author = {Zhang, Z. F. and Zhong, Lirong and White, Mark D. and Szecsody, James E.},
abstractNote = {Foam has the potential to effectively carry and distribute either aqueous or gaseous amendments to the deep vadose zone for contaminant remediation. However, the transport of foam in porous media is complicated because flow characteristics such as the effective viscosity are affected not only by foam properties but also by the sediment properties and flow conditions. We determined the average effective foam viscosity via a series of laboratory experiments and found that the effective foam viscosity increased with the liquid fraction in foam, the injection rate, and sediment permeability. These impacts are quantified with an empirical expression, which is further demonstrated with data from literature. The results show that the liquid fraction in foam and sediment permeability are two primary factors affecting effective foam viscosity. These results suggest that, when foam is used in deep vadose zone remediation, foam flow will not suffer from gravitational drainage and can distribute amendments uniformly in heterogeneous sediments.},
doi = {10.2136/vzj2011.0190},
journal = {Vadose Zone Journal, 11(4)},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {11}
}