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- W2754432011 abstract "This study is motivated by a microfluidic device that imparts a magnetic torque on an array of bacterial flagella. Bacterial flagella can transform their helical geometry autonomously in response to properties of the background fluid, which provides an intriguing mechanism allowing their use as an engineered element for the regulation or transport of chemicals in microscale applications. The synchronization of flagellar phase has been widely studied in biological contexts, but here we examine the synchronization of flagellar tilt, which is necessary for effective pumping. We first examine the effects of helical geometry and tilt on the pumping flows generated by a single rotating flagellum. Next, we explore a mean-field model for an array of helical flagella to understand how collective tilt arises and influences pumping. The mean-field methodology allows us to take into account possible phase differences through a time-averaging procedure and to model an infinite array of flagella. We find array separation distances, magnetic field strengths, and rotation frequencies that produce nontrivial self-consistent pumping solutions. For individual flagella, pumping is reversed when helicity or rotation is reversed; in contrast, when collective effects are included, self-consistent tilted pumping solutions become untilted nonpumping solutions when helicity or rotation is reversed." @default.
- W2754432011 created "2017-09-25" @default.
- W2754432011 creator A5026724868 @default.
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- W2754432011 date "2017-09-15" @default.
- W2754432011 modified "2023-10-11" @default.
- W2754432011 title "Autonomously responsive pumping by a bacterial flagellar forest: A mean-field approach" @default.
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- W2754432011 doi "https://doi.org/10.1103/physreve.96.033107" @default.
- W2754432011 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29346873" @default.
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