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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.0c02372
|2 doi
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|a eng
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| 100 |
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|a Kim, Hanul
|e verfasserin
|4 aut
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| 245 |
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|a Direct Measurement of Contact Angle Change in Capillary Rise
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|c 2020
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 08.12.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Capillary rise is important in many aspects of physical phenomena from transport in porous media to biotechnology. It is typically described by the Lucas-Washburn-Rideal equation (LWRE), but discrepancy between some experiments and the model still remains elusive. In this paper, we show that the discrepancy is simply from the contact angle change during the capillary rise with no help of any specific models, such as dynamic contact angle (DCA) models. To demonstrate this, we directly measure the contact angle change in the capillary rise for glycerol and carboxymethyl cellulose solutions as examples of Newtonian and non-Newtonian liquids. Unlike previous studies that used DCA models to explain the discrepancy, when the contact angle change is directly applied to the LWRE for all four tested fluids, the model agrees well with experimental data. The estimated contact angle from the capillary rise as a function of time is in good agreement with the directly measured contact angle within a narrow margin of error. To pinpoint the conditions for the discrepancy, we propose a new time scale when contact angle dynamics dominates. The contact angle dynamics that can be obtained from the macroscopic capillary rise may provide useful information for capillary flow in a more complicated geometry such as porous media
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|a Journal Article
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|a Lim, Jae-Hong
|e verfasserin
|4 aut
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| 700 |
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|a Lee, Kyoungmun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Choi, Siyoung Q
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 36(2020), 48 vom: 08. Dez., Seite 14597-14606
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|g year:2020
|g number:48
|g day:08
|g month:12
|g pages:14597-14606
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|u http://dx.doi.org/10.1021/acs.langmuir.0c02372
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