Cluster formation during particle settling in stratified fluid

2022 ◽  
Vol 7 (1) ◽  
Author(s):  
David Deepwell ◽  
Bruce R. Sutherland
Keyword(s):  
Cluster Formation ◽  
Stratified Fluid ◽  
Particle Settling

scholarly journals Influence of pycnocline on settling behaviour of non-spherical particle and wake evolution

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Magdalena M. Mrokowska
Keyword(s):  
Complex Dynamics ◽  
Stratified Fluid ◽  
Particle Orientation ◽  
Spherical Particles ◽  
Estimation Methods ◽  
Structure Evolution ◽  
Particle Settling ◽  
Faecal Pellets ◽  
Fluid Systems ◽  
Tightly Coupled

AbstractSettling of non-spherical particles in a stratified fluid exhibits complex dynamics in a low-to-moderate inertia regime. Although this process is involved in a wide variety of phenomena in natural fluid systems, its fundamental mechanisms are still unexplored. Understanding of particle settling in microscale is particularly important to explain challenging problems associated with ecological and biogeochemical processes in the ocean due to the delayed settling of particulate matter at pycnoclines. Here, I explore interactions between disk-shaped particles and a stratified fluid with a density transition. By laboratory experiments, I demonstrate that the settling dynamics of the disk crossing a density transition are tightly coupled with the wake structure evolution, and I observe for the first time in a two-layer ambient configuration a bell-shaped structure that forms on a jet after the wake has detached from the particle. Furthermore, I identify hydrodynamic conditions for the variations of settling velocity and particle orientation instabilities. These findings shed light on particle settling mechanisms necessary to explain dynamics of marine particles such as plankton, faecal pellets, and microplastics and may improve the estimation methods of sedimentation processes in various areas of earth sciences and engineering.

The flow generated by the rotation of a horizontal disk in a stratified fluid

1996 ◽  
Vol 22 ◽  
pp. 111
Author(s):  
P Davies
Keyword(s):  
Stratified Fluid

PREDICTING CERIUM + H2O CLUSTER FORMATION WITH SIMULATED AND EXPERIMENTAL SPECTROSCOPY

2016 ◽  
Author(s):  
Josey Topolski ◽  
Caroline Chick Jarrold ◽  
Manisha Ray ◽  
Jared Kafader
Keyword(s):  
Cluster Formation ◽  
Experimental Spectroscopy

CONVECTION AND PATTERN FORMATION OF MICRO-ORGANISMS IN A STRATIFIED FLUID

2008 ◽  
Author(s):  
Q. T. Mach ◽  
The Hung Nguyen ◽  
Georges LePalec
Keyword(s):  
Pattern Formation ◽  
Stratified Fluid ◽  
Micro Organisms

Dynamics of establishment of blocked flow in an inviscid stratified fluid

1998 ◽  
Author(s):  
Michihisa Tsutahara ◽  
Takeshi Kataoka
Keyword(s):  
Stratified Fluid

General Cluster Sorption Isotherm

2020 ◽  
Author(s):  
Christoph Buttersack
Keyword(s):  
Density Functional ◽  
Capillary Condensation ◽  
Cluster Formation ◽  
Full Range ◽  
Full Description ◽  
Cross Sectional ◽  
Macroporous Silica ◽  
Isotherm Equation ◽  
Type Iv ◽  
Classical Thermodynamics

<p>Adsorption isotherms are an essential tool in chemical physics of surfaces. However, several approaches based on a different theoretical basis exist and for isotherms including capillary condensation existing approaches can fail. Here, a general isotherm equation is derived and applied to literature data both concerning type IV isotherms of argon and nitrogen in ordered mesoporous silica, and type II isotherms of disordered macroporous silica. The new isotherm covers the full range of partial pressure (10<sup>-6</sup> - 0.7). It relies firstly on the classical thermodynamics of cluster formation, secondly on a relationship defining the free energy during the increase of the cluster size. That equation replaces the Lennard-Jones potentials used in the classical density functional theory. The determination of surface areas is not possible by this isotherm because the cross-sectional area of a cluster is unknown. Based on the full description of type IV isotherms, most known isotherms are accessible by respective simplifications. </p>

Resolving Issues of Empty Cluster Formation in KMEAN Algorithm Using Advanced Approach

2019 ◽  
Vol 7 (6) ◽  
pp. 443-448
Author(s):  
Saumya Kumar ◽  
Neetu Verma
Keyword(s):  
Cluster Formation
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