Materials Required:
● Granular powder (e.g., talc, starch, sand)
● Funnel
● Stand with clamp
● Graph paper or plain paper
● Ruler or scale
● Protractor (optional, for manual measurement)

Procedure:
● Open the virtual lab platform for the Angle of Repose experiment.
● Select the desired powder or granular material (e.g., talc, starch, or sand) from the dropdown list.
● Enter the weight of the material to be tested (in grams).
● Click on the “Start Simulation” button to initiate the virtual dropping process.
● Observe the cone-shaped pile formed and note the automatically generated values of:
• Height (h) of the pile (in cm)
• Radius (r) of the base (in cm)
● The simulation will calculate the angle of repose (θ) using the formula: θ = tan⁻¹(h / r).
● Repeat the experiment with different material types or weights to compare results.
● Record all observations and calculate the average angle of repose.

Observations:

Result
The average angle of repose for the given powder sample is found to be 35.02°.

Conclusion
● If θ < 30°, the material has excellent flow.
● If θ = 30°–40°, the material has good to fair flow.
● If θ > 40°, the material has poor flow.

Hence, the tested material exhibits good flow properties, as its angle of repose (35.02°) lies between 30° and 40°. This experiment helps to understand the flow characteristics of powders during handling, transport, and tablet manufacturing in the pharmaceutical industry.