Diffusion and Coagulation of Particles

2004 ◽  
pp. 163-208
2006 ◽  
Vol 24 (10) ◽  
pp. 1271-1276 ◽  
Author(s):  
Wen-Yan Sheng ◽  
X. F. Peng ◽  
D. J. Lee ◽  
Ay Su

1974 ◽  
Vol 6 (5) ◽  
pp. 898-902 ◽  
Author(s):  
A. P. Tishin ◽  
R. I. Khairutdinov

2016 ◽  
Vol 7 (6) ◽  
pp. 609-612
Author(s):  
Ina Tetsman ◽  
Irina Grinbergienė

There were made tests of particulate matter (aerosol), of coagula-tion efficiency, depending on the acoustic field sound pressure and frequency. It is described experimental stand that is used to do researches and methodology of experiments performance. It is used two sound generators for acoustic field excitation: piezoe-lectric and aero-acoustic. It was determined after researches, that increasing the frequency of the acoustic field, it is increased rate of particle coagulation when particle diameter not greater than 1 μm. Effectively coagulation of particles up to 1 μm in diameter must subsonic acoustic field frequencies, as the particles over 1 μm in diameter must be lower than the frequency of ultrasonic acoustic field. Atlikti labai mažo skersmens kietųjų dalelių koaguliacijos efektyvumo, priklausomai nuo akustinio lauko garso slėgio ir dažnio, tyrimai. Aprašytas tyrimams atlikti naudotas eksperimentinis stendas ir eksperimentų atlikimo metodika. Akustiniam laukui žadinti naudoti du garso generatoriai: pjezoelektrinis ir aeroakustinis. Atlikus tyrimus nustatyta, kad, didėjant akustinio poveikio dažniui, dalelių koaguliacijos greitis didėja, kai dalelių skersmuo neviršija 1 μm. Efektyviausiai dalelių iki 1 μm skersmens koaguliacijai reikia ultragarsinių dažnių, didesnio nei 1 μm skersmens dalelėms reikia žemesnio dažnio už ultragarsinį.


2012 ◽  
Vol 9 (2) ◽  
pp. 80-85
Author(s):  
C.I. Mikhaylenko ◽  
Yu.R. Valeeva

A mathematical model for a disperse system of gas-solid particles when passing pressure waves is decribed. The following assumptions are made: dispersed particles are capable of coagulation with increasing concentration; the dispersed particles are acted upon by the Stokes forces on the side of the dispersion medium and by gravity. The results of numerical simulation of the processes of sedimentation of a dispersed medium are presented. It is shown that one of the mechanisms of precipitation of fine disperced medium can be coagulation of particles during the passage of pressure waves.


1983 ◽  
Vol 16 (4) ◽  
pp. 299-304 ◽  
Author(s):  
KO HIGASHITANI ◽  
KIYOYUKI YAMAUCHI ◽  
YOSHIZO MATSUNO ◽  
GIJIRO HOSOKAWA

2007 ◽  
Vol 20-21 ◽  
pp. 366-370 ◽  
Author(s):  
Annamaria Vilinska ◽  
K. Hanumantha Rao ◽  
K.S.Eric Forssberg

Acidithiobacillus ferrooxidans cells grown in ferrous ions were used to study the surface modification of pyrite and chalcopyrite, with focus on coagulation of very fine particles (-5 m). The zeta-potential studies of the minerals, before and after bacterial treatment, showed that the cells have a distinct influence on the surface charge of pyrite and chalcopyrite. The maximum coagulation of particles determined by Turbiscan as a function of pH correlated well with the zetapotential results. Using diffuse reflectance FT-IR spectroscopic studies, the adhesion of cells showed a varied influence on these minerals. The results demonstrate that Acidithiobacillus ferrooxidans interact with pyrite and chalcopyrite differently, allowing selective coagulation of one mineral from the other under different pH conditions.


Sign in / Sign up

Export Citation Format

Share Document