English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The motion of an initially spherical capsule in a wall-bounded oscillatingshear flow is investigated via an accelerated boundary integral implementation.The neo-Hookean model is used as the constitutive law of the capsule membrane.The maximum wall-normal migration is observed when the oscillation period ofthe imposed shear is of the order of the relaxation time of the elasticmembrane; hence, the optimal capillary number scales with the inverse of theoscillation frequency and the ratio agrees well with the theoretical predictionin the limit of high-frequency oscillation. The migration velocity decreasesmonotonically with the frequency of the applied shear and the capsule-walldistance. We report a significant correlation between the capsule lateralmigration and the normal stress difference induced in the flow. The periodicvariation of the capsule deformation is roughly in phase with that of themigration velocity and normal stress difference, with twice the frequency ofthe imposed shear. The maximum deformation increases linearly with the membraneelasticity before reaching a plateau at higher capillary numbers when thedeformation is limited by the time over which shear is applied in the samedirection and not by the membrane deformability. The maximum membranedeformation scales as the distance to the wall to the power 1/3 as observed forcapsules and droplets in near-wall steady shear flows.

The dynamics of a capsule in a wall-bounded oscillating shear flow