Journal ArticleDOI
Ultrasonic fragmentation of agglomerate powders
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TLDR
In this paper, a theory for ultrasonic fragmentation of agglomerate particles suspended in liquids is presented, and an expression for the fragmentation rate as a function of ultra-osnic power and agglerate size is derived.About:
This article is published in Chemical Engineering Science.The article was published on 1993-01-01. It has received 134 citations till now. The article focuses on the topics: Particle size & Particle-size distribution.read more
Citations
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Precipitation of calcium carbonate by ultrasonic irradiation.
TL;DR: It was found that there exists an optimum range of horn immersion depth for maximizing the precipitation rate and the physical mixing effect, especially macrostreaming is the main factor that accelerates the precipitation rates of calcium carbonate during ultrasonic treatment.
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Nanoparticles as concrete additives: Review and perspectives
TL;DR: In this paper, the main modifications are (typical ranges shown, though great variability has been observed): reduction of set time (by 1-2h) and diffusivity (by 4-75%), and increase of strength (by 5-25%).
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Distinguishing between aggregates and agglomerates of flame-made TiO2 by high-pressure dispersion
Alexandra Teleki,R. Wengeler,Lukas Wengeler,Lukas Wengeler,Hermann Nirschl,Sotiris E. Pratsinis +5 more
TL;DR: In this paper, the potential of high pressure dispersion and dynamic light scattering (DLS) was explored for rapid and quantitative estimation of the extent of particle aggregation and agglomeration by analyzing the entire particle size distribution.
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Effect of nano-calcium carbonate on early-age properties of ultra-high-performance concrete
TL;DR: In this paper, the effects of nano-calcium carbonate (CaCO3) addition on the early-age properties of ultra-high-performance concrete cured at simulated cold and normal field conditions were investigated.
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Development of a Population Balance Model to Describe the Influence of Shear and Nanoparticles on the Aggregation and Fragmentation of Asphaltene Aggregates
TL;DR: In this paper, a population balance model is proposed to describe the kinetics of asphaltene flocculation-fragmentation in the presence of nanoparticles, and the model assumes that the adsorption of the nanoparticles on the nanoparticle surface would reduce the capacity of these asphaltic compounds to interact with each other.
References
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Journal ArticleDOI
Collapse of an initially spherical vapour cavity in the neighbourhood of a solid boundary
TL;DR: In this paper, a numerical method was proposed to solve the problem of balloon bubble collapse near a plane solid wall, using finite time steps and an iterative technique for applying the boundary conditions at infinity directly to the liquid at a finite distance from the free surface.
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Cavitation produced by Ultrasonics
B E Noltingk,E A Neppiras +1 more
TL;DR: In this article, the problem of cavitation produced by ultrasonic vibration is examined theoretically, and it is predicted that all cavitation phenomena will diminish and finally disappear as the frequency is raised.
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Agglomerate and Particle Size Effects on Sintering Yttria‐Stabilized Zirconia
TL;DR: In this article, the initial-, intermediate-, and final-stage sintering of fine crystallite yttria-stabilized zirconia was studied, and it was found that agglomerates limit attainable green density, interfere with the development of microstructure, impede initial-stage Sintering kinetics, and limit the potential benefit of the fine crystallites on final stage sinterings.