Rivulets of finite height

Gerlach, Felix; Hartmann, Maximilian; Hussong, Jeanette; Tropea, Cameron

doi:10.1016/j.colsurfa.2020.126012

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The use of rectangular U-grooves has been extended to various new applications such as cell trapping − and thermal management ,− by altering their structures from uniform channels ,,, to nonuniform ones, ,, even to channels with the sudden contraction , or enlargement. ,,− The general criteria and flow dynamics associated with capillary imbibition have been analyzed experimentally and theoretically. ,,− For capillaries with sharp edges, however, CF filaments and rivulets , may appear, and thus the flow dynamic becomes complicated. To prevent the existence of CF filaments, a rounded shape is employed for capillary channels and for the junction between small and large grooves (sudden enlargement). ,, Consequently, capillary flows in open channels with sharp vertical edges with or without the sudden enlargement still lack detailed explorations.…”

Section: Introductionmentioning

confidence: 99%

Imbibition Dynamics in a U-Groove Microchannel with Sudden Enlargement

Chen

Sheng

et al. 2023

Langmuir

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Imbibition dynamics in a rectangular U-groove that is connected to a sudden enlargement and complicated by the presence of Concus−Finn (CF) filaments is investigated using many-body dissipative particle dynamics. For open-ended sudden enlargement, four flow types are identified and depend on the contact angle θ y , the critical angle θ f associated with the occurrence of CF filaments, and the critical angle θ c associated with the occurrence of main flow. First, for θ y > θ f and θ y > θ c , the corner flow is absent, and the main flow stops at the end of the small Ugroove. Second, for θ c > θ y > θ f , the corner flow vanishes, but the main flow occurs. Third, for θ f > θ y > θ c , the corner flow takes place in the large U-groove, but the main flow is still absent. Fourth, for θ y < θ f and θ y < θ c , both the corner and main flows appear in the large U-groove. Additionally, the flow dynamics is greatly influenced by the length of the large U-groove (l e ). For closed-ended sudden enlargement, similar findings can be obtained. However, the outcome of the third case is altered for sufficiently small l e , and the sudden enlargement can eventually be filled.

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