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Storage and Flow of Solids

01 Jan 1964-
About: The article was published on 1964-01-01 and is currently open access. It has received 585 citations till now. The article focuses on the topics: Flow (mathematics).
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Journal ArticleDOI
TL;DR: In this paper, a modified Drucker-Prager/Cap (MDPC) model enhanced with density dependence is used for finite element modeling to characterize material compressibility and shear behavior.

14 citations

Journal ArticleDOI
TL;DR: A comprehensive methodology to evaluate the risks involved in gravity-driven flow of pharmaceutical powders, including mass flow/funnel flow pattern, arch formation under active stress state and passive stress state, and rathole formation is presented.

13 citations

Book ChapterDOI
01 Jan 2010
TL;DR: In this paper, the adhesion forces are dependent on material properties such as the hygroscopicity and viscosity of the substances composing the particles, which leads to a time consolidation (called caking) of amorphous water-soluble solids.
Abstract: Water-soluble chemicals, detergents, pharmaceuticals, and food powders often become sticky during handling at high temperature or humidity. Increasing the storage time at elevated temperature and humidity frequently leads to a time consolidation (called caking) of such powders. To clarify the mechanism of stickiness and caking, it is required that one understands the adhesion forces between single particles. The adhesion forces are dependent on material properties such as the hygroscopicity and viscosity of the substances composing the particles. Caking of crystalline water-soluble solids is caused by dissolution and re-crystallization of the crystalline substance. Time consolidation of amorphous water-soluble solids is primarily linked to sinter processes. The sinter kinetic strongly depends on the materials viscosity, which is a function of moisture content and temperature. In the current study, the caking and stickiness of different water-soluble powders such as dextrose syrup, yeast extract, sodium chloride, and milk powder are discussed based on the relevant adhesion mechanism.

13 citations

Journal ArticleDOI
TL;DR: In this article, a low shear mixing device consisting of a box with two moving walls and three static walls was used again to study granular mixing as a function of particle size.

13 citations

Journal ArticleDOI
TL;DR: In this article, a two-step co-milling process is investigated to produce well dispersible inhalable size range for ultrafine powders with nano-silica, magnesium stearate (MgSt), or Leucine (Leu), an amino acid.

13 citations