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Does macroscopic flow geometry influence wetting dynamic?
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DOI：10.1016/j.jcis.2011.06.029.png)
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Abstract
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The macroscopic flow geometry has long been assumed to have little impact on dynamic wetting behavior of liquids on solid surfaces. This study experimentally studied both spontaneous spreading and forced wetting of several kinds of Newtonian and non-Newtonian fluids to study the effect of the macroscopic flow geometry on dynamic wetting. The relationship between the dynamic contact angle, OD, and the velocity of the moving contact line, U, indicates that the macroscopic flow geometry does not influence the advancing dynamic wetting behavior of Newtonian fluids, but does influence the advancing dynamic wetting behavior of non-Newtonian fluids, which had not been discovered before. (C) 2011 Elsevier Inc. All rights reserved.
Keywords:
Dynamic wetting
Dynamic contact angle
Macroscopic flow geometry
Sessile drop method
Wilhelmy plate method
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