Visualization by light transmission of oil and water contents in transient two-phase flow fields

Darnault, Christophe; Throop, J. A.; DiCarlo, David A.; Rimmer, Alon; Steenhuis, Tammo S.; Parlange, Jean‐Yves

doi:10.1016/s0169-7722(97)00068-5

Cited by 77 publications

(61 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Surface conductivity effects for these large glass beads are assumed to be negligible given insignificant imaginary conductivity responses measured by spectral induced polarization [25]. The system developed for the light transmission measurements [6,26,27] contains a light source and detector (Figure 2). In this experiment a scientific digital camera (DFK 41BU02.H USB CCD, Imaging Source) with a 5 mm lens (H0514-MP, Imaging Source) is used as the detector to quantify the intensity of light transmitted through the tank.…”

Section: Methodsmentioning

confidence: 99%

The Dependence of Electrical Resistivity-Saturation Relationships on Multiphase Flow Instability

Liu

Moysey

2012

ISRN Geophysics

View full text Add to dashboard Cite

We investigate the relationship between apparent electrical resistivity and water saturation during unstable multiphase flow. We conducted experiments in a thin, two-dimensional tank packed with glass beads, where Nigrosine dyed water was injected uniformly along one edge to displace mineral oil. The resulting patterns of fluid saturation in the tank were captured on video using the light transmission method, while the apparent resistivity of the tank was continuously measured. Different experiments were performed by varying the water application rate and orientation of the tank to control the generalized Bond number, which describes the balance between viscous, capillary, and gravity forces that affect flow instability. We observed the resistivity index to gradually decrease as water saturation increases in the tank, but sharp drops occurred as individual fingers bridged the tank. The magnitude of this effect decreased as the displacement became increasingly unstable until a smooth transition occurred for highly unstable flows. By analyzing the dynamic data using Archie's law, we found that the apparent saturation exponent increases linearly between approximately 1 and 2 as a function of generalized Bond number, after which it remained constant for unstable flows with a generalized Bond number less than −0.106.

show abstract

Section: Methodsmentioning

confidence: 99%

The Dependence of Electrical Resistivity-Saturation Relationships on Multiphase Flow Instability

Liu

Moysey

2012

ISRN Geophysics

View full text Add to dashboard Cite

show abstract

“…Schincariol proposed a linear relation between optical density and saturation, but found that a quadratic relation has a better R 2 value; larger errors were found at lower saturations. Darnault et al (1998) have developed another method whereby the intensity of transmitted light through a thin two-dimensional ‰ume is digitally recorded, and the water saturation in two-phase NAPL-water experiments is correlated to the average hue value of the pixels. The disadvantages of this method are the thin ‰ume and the fact that a translucent porous medium must be employed.…”

Section: Saturation Measurement Via Optical Methodsmentioning

confidence: 99%

A Simplified Image Analysis Method to Study LNAPL Migration in Porous Media

Flores

Tanaka

Inui

et al. 2011

Soils and Foundations

View full text Add to dashboard Cite

A novel Simpliˆed Image Analysis Method was developed and tested to assess the saturation distribution values for water and LNAPLs (Light Non-Aqueous Phase Liquids) in granular soils subjected to ‰uctuating groundwater conditions. This method, based on the Beer-Lambert Law of transmissivity, determines the saturation of water (Sw) and LNAPLs (So) by comparing the average optical densities (Di) for each matrix element of the tested domain to the corresponding average optical densities for three base pictures of the same domain taken with two digital cameras attached to two diŠerent band-passˆlters (l＝450 nm and 640 nm). Two equations with two unknowns (Sw and So) are deˆned for each mesh element, which enables the saturation distribution to be calculated under dynamic conditions. The three base conditions for the domain are: Method was then applied to analyze the behavior of two ‰uctuat-ing groundwater systems, namely, two-phase air-water and three-phase air-water-LNAPL, in a one-dimensional column, 3.5×3.5×50 cm,ˆlled with Toyoura sand. The mass balance of the drainage-imbibition three-phase airwater-LNAPL system showed a diŠerence of just 4.7z in LNAPL, demonstrating that this non-intrusive and non-destructive method is reliable for providing water and LNAPL saturation distributions throughout the domain when studying the eŠects of porous soil contamination by LNAPLs subjected to dynamic conditions.

show abstract

“…The DNAPL saturation distribution in each box was assessed using a light transmission (LT) system based upon the methods described in Suchomel and Pennell (2006). Quantification of DNAPL saturation is based upon image hues that are correlated to saturation with calibration curves developed using the method of Darnault et al (1998). This method produces a pixel-by-pixel estimation of thickness-averaged saturation.…”

Section: Ii222 Experimental Set Upmentioning

confidence: 99%

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Abriola¹,

Miller²,

Pennell³

et al. 2013

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENT SUPPLEMENTARY NOTES ABSTRACTThe overarching goal of this research is to develop and demonstrate a comprehensive approach for field characterization of DNAPL source zones which quantifies the key features that control plume response. Here the intent is to integrate targeted (local-scale) in situ tests with transect-based observations of downstream contaminant flux or concentration and information on subsurface geologic variability. To address its primary goal, the research encompasses the following specific objectives: (1) identification of the most information rich metrics for linking NAPL architecture to plume response; (2) development and refinement of in situ test methods and modeling tools that can be used to quantify identified metrics in targeted regions of the source zone; (3) integration of these metrics and tools with current machine learning characterization methods for an overall source zone assessment protocol; and (4) development of simplified models for prediction of plume response. The research approach integrates batch, column and aquifer cell experiments with mathematical modeling and data processing tools to identify and quantify features of the DNAPL architecture controlling down gradient plume response. SUBJECT TERMSField characterization; Metric identification; DNAPL; SECURITY CLASSIFICATION OF:No classified information

show abstract

Visualization by light transmission of oil and water contents in transient two-phase flow fields

Cited by 77 publications

References 12 publications

The Dependence of Electrical Resistivity-Saturation Relationships on Multiphase Flow Instability

The Dependence of Electrical Resistivity-Saturation Relationships on Multiphase Flow Instability

A Simplified Image Analysis Method to Study LNAPL Migration in Porous Media

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Contact Info

Product

Resources

About