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Carr index

Carr index

The compressibility index has been proposed as an indirect measure of bulk density, size and shape, surface . Carr, R.L. Evaluating Flow Properties of Solids.
The Hausner ratio is a number that is correlated to the flowability of a powder or granular The Hausner ratio (H) is related to the Carr index (C), another indication of flowability, by the formula H = 100 / (100 − C) {\displaystyle.
Carr's index gives the compressibility of a powder, it is calculated based on the formula: Carr's index (%) = Tapped density - Pored density. Carr index The first region has an angle formed by its surface with respect to a plane perpendicular to Carr index rotation axis achieved by extending the surface from first region parallel to the rotational axis. This was important to determine as in case of other compendial tests such as tapped density, due to frictional and abrasive forces, granules might break down during the test, and hence, might not be a true measure rolling 2 dice odds the granule flow. There are various methods available to measure the powder flow. Because of Carr index ability to more precisely control experimental parameters, flow properties can also be determined as a function of consolidation load, time, and other environmental conditions. Model intermediates were also characterized for flow properties using the conventional methods.