Journal
ULTRASONICS SONOCHEMISTRY
Volume 15, Issue 4, Pages 274-278Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2007.09.012
Keywords
interfacial tension; ultrasonic waves; oil-water interface; capillary forces; pendant drop; oil recovery
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The effect of ultrasound on flow through a capillary using the pendant drop method was investigated. Water was injected into a 0.1 mm Hastelloy C-276 capillary tube submersed into several mineral oils with different viscosity, and kerosene. The average drop rate per minute was measured at several ultrasonic intensities. We observed 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 semi-quantitative results reveal that the remarkable change in the interfacial forces between oil and water could be the explanation to the enhancement of oil recovery when the ultrasonic waves are applied. (C) 2007 Elsevier B.V. All rights reserved.
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