2026-09-18T20:49:14Zhttps://ecommons.cornell.edu/server/oai/requestoai:ecommons.cornell.edu:1813/338282026-05-14T13:54:55Zcom_1813_35col_1813_47
Baver, Christine
Steenhuis, Tammo S
Parlange, Jean-Yves
2013-09-05T15:25:50Z
2018-01-29T07:00:40Z
2013-01-28
https://hdl.handle.net/1813/33828
8267034
Dynamic contact could provide a mechanism for initiating the instability of wetting fronts and the formation of gravity fingers/columns in porous media. To study those dynamic contact angles when gravity effects are present, rectangular capillary tubes are used to facilitate the observation of the complete interface without geometric distortion. Results show that if the dynamic contact angle minus the static contact angle is used, we obtain good agreement with previous observations. In addition, we show that in our experiments, unlike previous observations, contact angles are independent of capillary size. It also points out a way to calculate the capillary pressure at the wetting front as a function of the flux in the finger and grain size diameter.
en_US
dynamic contact angles
rectangular capillary tubes
instability
Dynamic Contact Angles And Wetting Front Instability In Soils
dissertation or thesis
application/pdf
Agricultural and Biological Engineering
Cornell University
Master of Science
M.S., Agricultural and Biological Engineering
Publication
Cornell Theses and Dissertations
Baver, Christine
5893a6ea-7af3-41d7-abc6-04bcd26ab5df
open.access
open.access
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<Abstract>Dynamic contact could provide a mechanism for initiating the instability of wetting fronts and the formation of gravity fingers/columns in porous media. To study those dynamic contact angles when gravity effects are present, rectangular capillary tubes are used to facilitate the observation of the complete interface without geometric distortion. Results show that if the dynamic contact angle minus the static contact angle is used, we obtain good agreement with previous observations. In addition, we show that in our experiments, unlike previous observations, contact angles are independent of capillary size. It also points out a way to calculate the capillary pressure at the wetting front as a function of the flux in the finger and grain size diameter.</Abstract>
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