Dynamics of viscous liquid bridges inside microchannels subject to external oscillatory flows

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dc.contributor.authorChen, Zhangxing (John)
dc.contributor.authorAhmadlouydarab, M.
dc.contributor.authorAzaiez, J.
dc.date.accessioned2017-03-16T23:07:31Z
dc.date.available2017-03-16T23:07:31Z
dc.date.issued2015-02
dc.description.abstractWe report on two-dimensional simulations of liquid bridges' dynamics inside microchannels of uniform wettability and subject to an external oscillatory flow rate. The oscillatory flow results in a zero net flow rate and its effects are compared to those of a stationary system. To handle the three phase contact lines motion, Cahn-Hilliard diffuse-interface formulation was used and the flow equations were solved using the finite element method with adaptively refined unstructured grids. The results indicate that the liquid bridge responds in three different ways depending on the substrate wettability properties and the frequency of the oscillatory flow. In particular below a critical frequency, the liquid bridge will rupture when the channel walls are philic or detach from the surface when they are phobic. However, at high frequencies, the liquid bridge shows a perpetual periodic oscillatory motion for both philic and phobic surfaces. Furthermore, an increase in the frequency of the flow velocity results in stabilization effects and a behavior approaching that of the stationary system where no rupture or detachment can be observed. This stable behavior is the direct result of less deformation of the liquid bridge due to the fast flow direction change and motion of contact lines on the solid substrate. Moreover, it was found that the flow velocity is out of phase with the footprint and throat lengths and that the latter two also show a phase difference. These differences were explained in terms of the motion of the two contact lines on the solid substrates and the deformation of the two fluid-fluid interfaces.en_US
dc.description.grantingagencyNSERCen_US
dc.description.refereedYesen_US
dc.description.sponsorshipIndustrial consortium in Reservoir Simulation and Modelling; Foundation CMG; Alberta Innovates.en_US
dc.identifier.doi10.1103/PhysRevE.91.023002
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/35029
dc.identifier.grantnumberNSERC: IRCPJ365863-12; AITF: G203000197; AIEES: 3130.en_US
dc.identifier.urihttp://hdl.handle.net/1880/51876
dc.publisherPhysical Review Een_US
dc.publisher.departmentChemical & Petroleum Engineeringen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.relation.ispartofseriesE91;1539-1549
dc.titleDynamics of viscous liquid bridges inside microchannels subject to external oscillatory flowsen_US
dc.typejournal article
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