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University of Cambridge > Talks.cam > DAMTP Statistical Physics and Soft Matter Seminar > Nonlinear and collective dynamics of model cilia
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If you have a question about this talk, please contact Sarah Loos. Motile cilia are slender, flexible organelles used by cells across eukaryotic life to move and manipulate surrounding fluids. In this talk, I will describe and use two modelling approaches to probe cilia dynamics at both the individual and collective levels. At the individual level, I will present a study where we make of use the follower-force model to explore the internal structural properties of cilia. I will show how even modest values of bending modulus anisotropy can eliminate 3D states, allowing only 2D planar beating to emerge. At the collective level, I will present results examining the emergence and coordination of cilia on a spherical surface using a model ciliate akin to the well-studied algae colony Volvox. Here, we make use of a modelling framework that we refer to as the filament oscillator model. Its defining feature is that the cilia are governed by just two dynamic variables, but retain their filament-like shape. We find that for sufficiently flexible cilia, there is bistability between symplectic and diaplectic metachronal waves. I will discuss this result, as well as characterise the resulting propulsive capabilities of these emergent states. This talk is part of the DAMTP Statistical Physics and Soft Matter Seminar series. This talk is included in these lists:
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