Sensor and Numerical Simulator Evaluation for Porous Medium Desiccation and Rewetting at the Intermediate Laboratory Scale
Citations
29 citations
Additional excerpts
...Soil desiccation was investigated as a potential vadose zone remediation technology, including laboratory studies (Ward et al., 2008; Oostrom et al., 2009, 2012a, 2012b; Truex et al., 2011), modeling studies (Ward et al., 2008; Truex et al., 2011), and i eld testing (Truex et al., 2012a, 2012b)…...
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24 citations
22 citations
Cites background or methods from "Sensor and Numerical Simulator Eval..."
...Hydraulic properties of Hanford lysimeter and 100-mesh sand (at er Oostrom et al. 2012a)....
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...…transport dominates, have been discussed by, e.g., Fayer and Simmons (1995), Morel-Seytoux and Nimmo (1999), and Webb (2000). h e relatively simple extension theory by Webb (2000) has been used successfully by Oostrom et al. (2012a, 2012b) to simulate desiccation in intermediate-scale l ow cells....
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...Evaporation can remove pore water and may result in very low moisture contents and decreased water relative permeability in the desiccated zone (Ward et al., 2008; Oostrom et al., 2009, 2012a,2012b; Truex et al., 2011)....
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...Laboratory and modeling studies (Ward et al., 2008; Oostrom et al., 2009, 2012a,2012b; Truex et al., 2011) suggest that the overall performance of desiccation in limiting water and contaminant l ux to the groundwater is a function of the i nal moisture content, contaminant concentration, sediment…...
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...Because the transport of dry gas is directly related to the permeability of the porous medium, higher permeability zones in soil columns and l ow cells packed with heterogeneous media dried more quickly than lower permeability zones (Oostrom et al., 2009, 2012a,2012b)....
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12 citations
Cites background from "Sensor and Numerical Simulator Eval..."
...Oostrom et al. (2012) measured h as low as about −900 m in a laboratory experiment....
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9 citations
Cites background or methods or result from "Sensor and Numerical Simulator Eval..."
...…sand and only a small fraction of the total water l ux is advectively transported through this sand. h e internal temperature and relative humidity responses during desiccation are consistent with observations by Oostrom et al. (2009, 2012) in other intermediate-scale l ow cell experiments....
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...As also shown by Oostrom et al. (2012) for desiccation of a heterogeneous system in a larger Fig....
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...…equal to the irreducible water saturations obtained by Schroth et al. (1996; Table 2) to minimize water movement due to redistribution for the duration of the desiccation experiments (30 d). h e validity of this assumption has been demonstrated using 1-m-long columns by Oostrom et al. (2012)....
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...A main advantage of this method is that it does not require rei tting of the capillary pressure–saturation experimental data obtained for saturations larger than irreducible. h e method has been applied successfully to simulate l ow cell experiments by Oostrom et al. (2012)....
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...10. h e temperature minima for the reported experiments are larger than observed in Oostrom et al. (2009, 2012) due to use of smaller gas injection rates....
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References
414 citations
"Sensor and Numerical Simulator Eval..." refers methods in this paper
...Dual-Probe Heat Pulse Sensors DPHP Specii c Heat Sensors (East 30 Sensors, Pullman, WA) were used to measure water content. h e sensor type, described in detail by Campbell et al. (1991), consists of two parallel hypodermic needles separated by a i xed distance....
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287 citations
"Sensor and Numerical Simulator Eval..." refers methods in this paper
...…Devices, Inc., Pullman, WA). h e thermal properties of the polycarbonate were provided by the manufacturer (McMaster-Carr, Robbinsville, NJ). h e hydraulic properties of the sands and the Hanford sediment were obtained using methods described by Wietsma et al. (2009) and Schroth et al. (1996)....
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229 citations
"Sensor and Numerical Simulator Eval..." refers background or methods in this paper
...…objectives were to (i) evaluate the utility of candidate sensors to monitor during the desiccation and rewetting processes and (ii) test and verify the Water-Air-Energy mode of the STOMP (White and Oostrom, 2006) simulator using mostly independently obtained l uid and hydraulic property values....
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...h e physical experiment was simulated with the water–air–energy mode of the STOMP simulator (Ward et al., 2005; White and Oostrom, 2006; Oostrom et al., 2009), solving the water and air mass balance equations and the energy conservation equation. h e partial dif erential equations for l ow and…...
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...h e physical experiment was simulated with the water–air–energy mode of the STOMP simulator (Ward et al., 2005; White and Oostrom, 2006; Oostrom et al., 2009), solving the water and air mass balance equations and the energy conservation equation. h e partial dif erential equations for l ow and transport are discretized following the integrated-volume i nite dif erence method by integrating over a control volume. h e inclusion of the wall in the model and the coni guration of the heterogeneous experiments required the use of a three-dimensional model....
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...This paper shows which sensors successfully measured drying and we ng responses, and reports on the STOMP performance....
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...So far, only a few laboratory or i eld An intermediate-scale experiment involving desicca on and rewe ng of a porous medium was conducted to evaluate the response of several soil moisture sensors and the per- formance of the multiphase flow simulator STOMP....
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212 citations
"Sensor and Numerical Simulator Eval..." refers methods in this paper
...h e physical experiment was simulated with the water–air–energy mode of the STOMP simulator (Ward et al., 2005; White and Oostrom, 2006; Oostrom et al., 2009), solving the water and air mass balance equations and the energy conservation equation. h e partial dif erential equations for l ow and…...
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...Numerical Simula ons h e physical experiment was simulated with the water–air–energy mode of the STOMP simulator (Ward et al., 2005; White and Oostrom, 2006; Oostrom et al., 2009), solving the water and air mass balance equations and the energy conservation equation....
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144 citations
"Sensor and Numerical Simulator Eval..." refers methods in this paper
...Because of the swelling properties of bentonite, its hydraulic properties were not directly measured except for the air permeability of the dry material. h e laboratory method used was based on designs by Corey (1957) and Springer et al. (1998)....
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...h e laboratory method used was based on designs by Corey (1957) and Springer et al. (1998)....
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...h e laboratory method used was based on designs by Corey (1957) and Springer et al....
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