Method of Determining Angle of Repose

The most regular methods to determine the static angle of the repose can be classified on the base of the below two significant experimental variables.

1.         The height may vary as a form of pile or powder passes through the height of the funnel, can be determined relative to the base.

2.         The basis on which the structure of the pile forms can be fixed diameter or the powder diameter cone may be permitted to be converted into pile forms.

Since the size of the granules decreases, the flow of granules is less freely. Particle size distribution affects granulation separation and internal flow. With comparatively small size particles, particle flow throughout the orifice is restricted, because the united forces among the particles are of a magnitude equal to the gravitational force. As gravitational force is the work of diameter raised in the third power, it is important that the particle size increases, the flow is made easy. Through the flow by the hopper, the granules display the internal flow and demixing. Due to the frictional force, the flow of the granules is interrupted. Therefore, the digression of the angle of repose is articulated as the coefficient of friction μ.

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