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Vol. 191, Issue 8, August 2015, pp. 40-45




Spontaneous Capillary Flow: Should a Dynamic Contact Angle be Taken into Account ?


University Grenoble Alpes, F-38000, Grenoble Department of Biotechnology, CEA, LETI, Campus MINATEC, 38054, Grenoble, France
Tel.: 0033 438783551

E-mail: jean.berthier@cea.fr


Received: 24 June 2015 /Accepted: 30 July 2015 /Published: 31 August 2015

Digital Sensors and Sensor Sysstems


Abstract: Spontaneous capillary flow is an interesting solution to move fluids either in microgravity conditions, i.e. in space, or in microfluidic systems, for biotechnology and biology for example. In both cases, gravity is negligible and capillarity becomes the dominant force. Spontaneous capillary flow onset, as well as the dynamics of capillary flows have been recently documented in the literature for channels of different shapes, confined or open. However, the role of the dynamic contact angle is still unclear. This work aims at bringing a new light on the effect of the dynamic contact angle in the dynamics of capillary flows.


Keywords: Spontaneous capillary flow (SCF), Capillarics, Capillary velocity, Dynamic and static contact angles.


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