منابع مشابه
Quasistatic relaxation of arbitrarily shaped sessile drops.
We study a spontaneous relaxation dynamics of arbitrarily shaped liquid drops on solid surfaces in the partial wetting regime. It is assumed that the energy dissipated near the contact line is much larger than that in the bulk of the fluid. We have shown rigorously in the case of quasi-static relaxation using the standard mechanical description of dissipative system dynamics that the introducti...
متن کاملPattern formation in drying drops
Ring formation in an evaporating sessile drop is a hydrodynamic process in which solids dispersed in the drop are advected to the contact line. After all the liquid evaporates, a ring-shaped deposit is left on the substrate that contains almost all the solute. Here I show that the drop itself can generate one of the essential conditions for ring formation to occur: contact line pinning. Further...
متن کاملObservations on Vase-shaped, Iron-containing Houses of Two Colorless Flagellates of the Family Bicoecidae
Microscopy of coverslips that had been allowed to float on water from an aquarium standing over sand in a deep Petri dish revealed the presence of two kinds of colorless flagellates living in stalked, transparent vase-shaped houses (Fig. 1). One of the flagellates inhabits an urn-shaped house which in my material was invariably attached to the sheath around chains of the bacterium Sphaerotilus ...
متن کاملOscillating and star-shaped drops levitated by an airflow.
We investigate the spontaneous oscillations of drops levitated above an air cushion, eventually inducing a breaking of axisymmetry and the appearance of "star drops". This is strongly reminiscent of the Leidenfrost stars that are observed for drops floating above a hot substrate. The key advantage of this work is that we inject the airflow at a constant rate below the drop, thus eliminating the...
متن کامل740 Ma vase-shaped microfossils from Yukon, Canada: Implications for Neoproterozoic chronology and biostratigraphy
Biostratigraphy underpins the Phanerozoic time scale, but its application to pre-Ediacaran strata has remained limited because Proterozoic taxa commonly have long or unknown stratigraphic ranges, poorly understood taphonomic constraints, and/or inadequate geochronological context. Here we report the discovery of abundant vase-shaped microfossils from the Callison Lake dolostone of the Coal Cree...
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ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2020
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.5.033609