Feasibility of Ultrasonic Enhancement of Flow in Clayey Sands

Reddi, Lakshmi N.; Berliner, S.; Lee, K. Y.

doi:10.1061/(asce)0733-9372(1993)119:4(746)

Cited by 16 publications

(13 citation statements)

References 1 publication

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“…At high acoustic power levels, large amounts of muddy water were produced from the sample, while during baseline testing the effluent water was clear. This finding is consistent with Reddi et al (1993) except that their work was done with the sediment at atmospheric pressure.…”

Section: Ajux Sandsupporting

confidence: 90%

“…These results stand in contrast to those reported by Reddi et al (1993. They used a 20 kHz, 500 Watt ultrasonic horn operating in a tank of sand at atmospheric pressure (see Section 2.2.1) and they observed an increase in hydraulic conductivity of up to several orders of magnitude with acoustic excitation.…”

Section: Oklahoma Sandcontrasting

confidence: 88%

“…As part of the current investigation approximately twenty potentially important papers were identified, located, and translated into English. Reddi et al (1993) used a 20 kHz, 500 Watt ultrasonic horn to acoustically excite mixtures of sand and clay at various densities in cylindrical tanks where the sediment is at atmospheric pressure. An increase in hydraulic conductivity of up to several orders of magnitude was observed in all tests with a maximum increase noted after 8 to 10 minutes of excitation.…”

Section: 'mentioning

confidence: 99%

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Acoustically enhanced remediation of contaminated soils and ground water. Volume 2

1995

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Section: Ajux Sandsupporting

confidence: 90%

Section: Oklahoma Sandcontrasting

confidence: 88%

Section: 'mentioning

confidence: 99%

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Acoustically enhanced remediation of contaminated soils and ground water. Volume 2

1995

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“…Finally, high power ultrasonics has also been applied by environmental engineers to accelerate remediation of nonaqueous-phase liquids (NAPL) from soils [81][82][83][84][85][86][87][88][89][90] and by by textile industry to enhance the mass transfer of dyes and dry cleaning agents into porous fabric [91][92][93]. The food industry has also successfully applied ultrasonic stimulation to extract oil from food products such as soy beans [94,95].…”

Section: Spe-106521-stu (Student 5)mentioning

confidence: 99%

The Influence of Ultrasonic Energy on Capillary Fluid Displacement

Hamida

2006

SPE Annual Technical Conference and Exhibition

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In recent years, field tests and laboratory investigations have demonstrated that high intensity acoustic stimulation may enhance oil recovery in rocks. This technology is not only technologically feasible, but also serves as an economical, environmentally friendly alternative to currently accepted EOR methods. It requires low capital expenditure, and yields almost immediate improvement without any additional EOR agents. Despite a vast body of empirical and theoretical support, this technology lacks sufficient understanding to make meaningful, consistent engineering predictions. This is in part due to the complex nature of the physical processes involved, as well as due to a shortage of fundamental/experimental research. Much of what we believe is happening within ultrasonically stimulated porous media is speculative and theoretical.This paper aims at identifying and analyzing the influence of high-frequency, high-intensity ultrasonic radiation on the miscible and immiscible displacement of oil in capillary media. We first investigate the effect of ultrasound on flow through a capillary via the pendant drop method. Water was injected into a capillary which is submersed into various processed mineral oils and kerosene. The average drop rate per minute was measured at several ultrasonic intensities, and we determined that there exists a peak drop rate at a characteristic intensity, which strongly depends on oil viscosity and the interfacial tension between water and the oil. The second set of experiments comprises of Hele-Shaw type experiments designed to study instabilities at liquid-liquid interface when ultrasound is applied. Fractal analysis techniques were used to quantify the degree of fingering and branching, allowing a rough assessment of the degree of perturbation generated at the interface. Miscible Hele-Shaw experiments are also presented to illustrate the effect of viscous forces alone. We found that ultrasound acts to stabilize the interfacial front, and that such effect is most pronounced at low viscosity ratios. The third series of experiments focuses on the effect of ultrasound on spontaneous (capillary) imbibition of an aqueous phase into oil-saturated Berea sandstone and Indiana limestone plugs. Both counter-current and co-current geometries were tested. Due to the intrinsically unforced, gentle nature of the process, and their strong dependence on wettability, interfacial tension, viscosity and density, such experiments provide valuable insight into some of the governing mechanisms behind ultrasonic stimulation.

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“…Since then, various investigations have been undertaken to increase the flow rate. [4][5][6][7] In this study, we investigated an innovative technique for reducing the water content in unconsolidated soils using the vibrational energy generated from a flexible transducer. The principal goal of this method is to accelerate the movement and permeation of water through water pores, so that the water drains out easily with the aid of vibration.…”

mentioning

confidence: 99%

THE DIFFERENTIATION OPERATOR ON SUBSETS OF THE FIELD OF $ p$-ADIC NUMBERS

Kochubei¹

1993

Russian Acad. Sci. Izv. Math.

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The acceleration of water content reduction by vibrational energy was investigated with a series of laboratory tests. Vibration was generated with a poly(vinylidene fluoride) (PVDF) film as a flexible transducer at various frequencies. Test conditions included the power and duration of sonic energy, and the soil type. Test results showed a significant increase in dewaterability when ultrasound was applied. The time required for the outflow of the same amount of water was shorter for the sonicated conditions. The degree of enhancement varied with the test conditions. Using the test results, we discuss the potential development of a new method that can reduce the dewatering period.

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Feasibility of Ultrasonic Enhancement of Flow in Clayey Sands

Cited by 16 publications

References 1 publication

Acoustically enhanced remediation of contaminated soils and ground water. Volume 2

Acoustically enhanced remediation of contaminated soils and ground water. Volume 2

The Influence of Ultrasonic Energy on Capillary Fluid Displacement

THE DIFFERENTIATION OPERATOR ON SUBSETS OF THE FIELD OF $ p$-ADIC NUMBERS

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