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Granular Materials: Liquid-like Properties of Sand - page 8 / 14

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flow rate lpm

7 6.5 6 5.5 5 4.5 4 3.5 3

80

100

120 location mm

140

Fig 5

This graph shows the conversion for the flow rate from location in mm to flow rate in liters/min.

We found out that for different flow rates, the distance that the ball sunk differed

(shown in figure 6). At the higher flow rate, the sphere was able to sink all the way down

to the bottom of the sand, while at a lower flow rate the sphere could only sink part way

in the sand. This was conducted by changing the gas flow and measuring the distance the

ball travels without getting stuck (the string becomes limp). From this, we determined

that the flow rate must be above 120 to expect a liquid-like behavior.

8

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