منابع مشابه
Rheological characterization of pharmaceutical powders using tap testing, shear cell and mercury porosimeter.
Most of the pharmaceutical processes involved in the manufacturing of so lid dosage forms are connected with powder flow properties, at least for some of the intermediate steps. Powder flow characteristics are commonl y investigated by various measurements, such as handling angles, tap tes ting, shear cell measurements, etc. All these approaches allow the calc ulation of indices characterising ...
متن کاملSimulation of cohesive fine powders under a plane shear.
Three-dimensional molecular-dynamics simulations of cohesive dissipative powders under a plane shear are performed. We find the various phases depending on the dimensionless shear rate and the dissipation rate as well as the density. We also find that the shape of clusters depends on the initial condition of velocities of particles when the dissipation is large. Our simple stochastic model repr...
متن کاملElectrostatic Charge Generation due to Shear Deformation of Pharmaceutical Powders
In powder handling operations, such as mixing, conveying, sieving and milling, particles frequently make contact with each other and the walls of the processing equipment. During these interactions, the electrification of particles takes place, commonly known as tribocharging. This paper focuses on investigating the tribocharging characteristics of bulk powders under shear deformation. In parti...
متن کاملSimulation of cohesive fine powders under plane shear
Three dimensional molecular dynamics simulation of cohesive dissipative powders under a plane shear is performed. By drawing the phase diagrams for several densities, we confirm the existence of various distinct steady phases, where some of them are realized by competition between the equilibrium phase transition and the dynamic instability caused by inelastic collisions. It is found that the s...
متن کاملMeasuring cosmic shear with the ring statistics
Context. Commonly used methods to decompose Eand B-modes in cosmic shear, namely the aperture mass dispersion and the E/B-mode shear correlation function, suffer from incomplete knowledge of the two-point correlation function (2PCF) on very small and/or very large scales. The ring statistics, the most recently developed cosmic shear measure, improves on this issue and is able to decompose Eand ...
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ژورنال
عنوان ژورنال: Journal of the Research Association of Powder Technology, Japan
سال: 1974
ISSN: 1883-8766
DOI: 10.4164/sptj1964.11.199