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which organisms induce puller/pusher flow fields at finite reynolds numbers?
but those are still zero Re…
Kirsty: I think the model is for zero Re
Hi Kristy, you can find the list of organisms which can have finite Re in our manuscript https://doi.org/10.1017/jfm.2020.719.
Forswimming microorganisms, the Re ranges from 10−4 for bacteria (Brennen & Winet1977), 10−3 for Chlamydomonas, 0.01–0.1 for Volvox (Drescher et al. 2009), 0.1–1 forfreely swimming zooplankton Daphnia magna (Wickramarathna, Noss & Lorke 2014),0.2–2 for Paramecia depending on swimming or escaping mode (Ishikawa & Hota 2006),O(10) for Pleurobrachia and 20–150 for copepods (Kiørboe, Jiang & Colin 2010).Here are some examples of the same.
ah okay thanks!
great talk Eva! in the blake tensor model - what’s the approx height above which waves no longer emerge? (relative to radius of orbit say?)
Thanks Kirsty! The model begins to break down for h/d > 3 or so (h distance from substrate, and d distance between cilia)
What determines the direction of swimming ? Can these sperms stray away from the straight forward path?
Non-Newtonian comment: one option can be embedding the swimmer in a Newtonian fluid plus a discrete network of viscoelastic filaments, see Wrobel, Fauci, Cortez et al
I will check those references out. Thanks!