Results 251 to 260 of about 7,399 (294)

Measurement of the Repose Angle of aTablet Granulation*

Journal of the American Pharmaceutical Association (Scientific ed.), 1955
In order to study the problem of granulation flow in tableting as it is related to interparticle friction, the response angle of a sulfathiazole granulation was studied as a function of average particle size, presence of lubricants, and admixture of fines.In general, the repose angle increased with decreasing particle size.Talc added to granules in ...
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The Distribution of Angle-of-Repose Data

Journal of Geoscience Education, 1998
Disinterested physical geology students can be enticed into performing an experiment that takes them though the scientific method and utilizes math skills if offered extra credit. The experiment causes students to compare the angle of repose of different substances, by measuring the heights and diameters of individual piles.
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Angle of Repose of Snow on Solids

Nature, 1940
IT is well known that the friction of solids on snow surfaces is larger than on ice surfaces. The higher kinetic friction obtained on snow is attributed to the extra work done in displacing and compressing the snow crystals1. This may apply to the sliding of a ski or a sleigh on snow.
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Geometric effect of angle of repose revisited

Granular Matter, 2014
We report on a universal pattern observed in the collapse dynamics of a sand heap. Collapse dynamics of a three-dimensional sand heap were studied through experiments and numerical simulations. A phenomenological law that describes the shape of a collapsed sand heap was found, we call this the geometric constitutive law of friction.
Miki Y. Matsuo, Daisuke Nishiura, Hide Sakaguchi   +2 more
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Angle of repose and internal friction

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1966
Abstract The relation between angle of repose and angle of internal friction in a fragmented mass is discussed, and experiments with crushed rocks are reported. It is concluded that the angle of repose is not generally the angle of internal friction of the material in the pile, but of the same material in a more closely packed condition.
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Study on the Angle of Repose of Nonuniform Sediment

Journal of Hydrodynamics, 2009
A conception of exposure degree is used in this article to account for the hiding and exposure mechanism of nonuniform sediment transport. The force arms of particles on the bed slope are assumed to be a function of the exposure degree, which is stochastically related to the size and gradation of bed materials. Based on this conception, the formula for
Feng-guang Yang, Xing-nian Liu, Ke-jun Yang, Shu-you Cao   +3 more
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Angles of repose, angles of shearing resistance and angles of talus slopes

Earth Surface Processes, 1977
Recent arguments that the straight parts of talus slopes stand, in general, at angles less than the angle of repose of the talus material are considered in relation to different test procedures used in the measurement of the repose angle. Observations on coarse, well sorted, angular fragments showed no significant difference between the values for this
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The angle of repose of potash pellets

Powder Technology, 1974
Abstract The angle of repose of a granular medium is shown not to be a unique property of the mateial, but rather to depend on the deposition and storage conditions of the medium. It may consequently be varied by varying these conditions. A knowledge of the angle of repose of potash pellets was required for purposes of intercontinental shipping of ...
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ANGLE OF REPOSE AND ANGLE OF SLIDING FRICTION: AN EXPERIMENTAL STUDY

Geological Society of America Bulletin, 1945
Earlier studies of factors determining subaerial angles of repose of loose material have produced diverse results. In order to obtain dependable information for use in geomorphic investigations a controlled experimental study was undertaken. Results show that the angle of repose varies (1) inversely with size of fragments in perfectly sorted materials,
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Quantification of mechanisms governing the angle of repose, angle of tilting, and Hausner ratio to estimate the flowability of particulate materials

Powder Technology, 2021
Haim Kálmán
exaly