Significance of Angle of repose
The angle of repose is a critical measure in assessing the flowability of powdered materials. It represents the maximum angle at which a pile of powder or granules can remain stable without sliding, indicating their flow characteristics. This angle is essential for understanding the behavior of powders during mixing and tablet formation. Lower angle values suggest better flowability, making the angle of repose a vital parameter in the formulation and processing of powders in various applications.
Synonyms: Slope
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The concept of Angle of repose in scientific sources
The Angle of repose is a critical measure of flowability in various materials, indicating the maximum stable angle for piles of powders or granular substances, including microspheres and specific organic materials like Grevillea robusta gum.
From: World Journal of Pharmaceutical Research
(1) A parameter evaluated during preformulation studies indicating the flowability of powdered substances used in tablet formulation.[1] (2) The maximum angle between the surface of a pile of powder or granules and the horizontal plane, sensitive to changes in particle size and moisture content.[2] (3) A measurement used to evaluate the flow characteristics of powder blend by determining the maximum angle of its slope when poured.[3] (4) The maximum angle at which a pile of bulk material maintains its shape without sliding; an important property for predicting the flowability of powders.[4] (5) A measure of the maximum angle at which microspheres can rest on a surface, indicating their flow properties.[5]
From: Ancient Science of Life
(1) A measure of the flowability of a powder, with a calculated angle of 29.05 degrees for the powdered roots of Cocculus hirsutus.[6]