Procedure for Angle of Repose

Following is the procedure to perform the angle of repose granules.

1. Select a glass funnel, in which there is a spherical stem of 15 to 30 mm in diameter with a flat edge, Fix funnel with a clamp.

2. Place a glass plate and position it under the glass funnel, Place a graph paper on the glass plate.

3. Take 50 grams of granules.

4. While blocking the funnel hole by the thumb, add the granule to the funnel.

5. Remove the thumb. Granule flow on paper and forms a cone-shaped pile.

6. Adjust the funnel clamp so that the gap amongst the stem of a funnel and the peak of the powder is as 3mm.

7. Until a suitable gap is achieved repeat the steps 5-6.

8. Lastly, pour granules back in a funnel and allowed it to flow

9. Unlike each other on a circular basis on graph paper, mark 4 digits. Record all readings in the table there is d is diameter and r is Radius. 

10. Using two rulers measure the pile height. Keep a ruler vertically and another is horizontal to touch the pile peak. Then record the value of the vertical scale and record it in the table, this value stands for height h.

11. Repeat the process for two more trials for average readings.

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