Distribution of particle displacements due to swimming microorganisms
نویسندگان
چکیده
منابع مشابه
Computing the distribution of displacements due to swimming microorganisms
with n = N/V the number density of swimmers. This is nonzero (and might diverge) in the limit V → ∞, reflecting the cumulative effect of multiple swimmers. Note that this expression is exact, within the problem assumptions: it doesn’t even require N to be large. It is not at all clear that (4) leads to diffusive behavior, but it does [2–4]: the “support” of the drift function ∆(η, t) typically ...
متن کاملDistribution of particle displacements in biomixing
The experiments of Leptos et al. [1] show that the displacements of small particles affected by swimming microorganisms achieve a non-Gaussian distribution, which nevertheless scales diffusively. We use a simple model where the particles undergo repeated ‘kicks’ due to the swimmers to explain the shape of the distribution. Leptos et al. study the microscopic algae Chlamydomonas reinhardthii. Th...
متن کاملThe hydrodynamics of swimming microorganisms
Cell motility in viscous fluids is ubiquitous and affects many biological processes, including reproduction, infection and the marine life ecosystem. Here we review the biophysical and mechanical principles of locomotion at the small scales relevant to cell swimming, tens of micrometers and below. At this scale, inertia is unimportant and the Reynolds number is small. Our emphasis is on the sim...
متن کاملDiscontinuous Pore Fluid Distribution under Microgravity Due to Particle Rearrangement
1 Department of Civil and Geomatics Engineering, M/S EE94. California State University, Fresno, CA 93740. USA *e-mail: [email protected], web page: http://www.csufresno.edu 2 Department of Civil and Environmental Engineering, University of Central Florida, Orlando, FL 32816. USA 3 Universities Space Research Association, Mail Code EC3, Building 29, Room 110, NASA Johnson Space Center, 2101 NA...
متن کاملHydrodynamic phase locking of swimming microorganisms.
Some microorganisms, such as spermatozoa, synchronize their flagella when swimming in close proximity. Using a simplified model (two infinite, parallel, two-dimensional waving sheets), we show that phase locking arises from hydrodynamics forces alone, and has its origin in the front-back asymmetry of the geometry of their flagellar waveform. The time evolution of the phase difference between co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2015
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.92.023023