Item: Table tennis ball avalanche experiments
Title: Table tennis ball avalanche experiments
Proceedings: Proceedings of the 1994 International Snow Science Workshop, Snowbird, Utah, USA
Authors: Kenji Kosugil, Atsushi Sato, Osamu Abe, Yasuaki Nohguchi, Yutaka Yamada, Kouichi Nishimura and Kaoru Izumi
Abstract: Table tennis ball avalanche (TTBA) experiments were carried out on an inclined chute to study the dynamics and the structures of snow avalanches. The chute is 20 m long and 1 m wide; its inclination is 30 degrees. Ten thousand balls were released from the top of the chute. Measurements with video showed that the velocity of the head reached 8 m/s and was always larger than that of the tail, and accordingly the length of the TTBAs increased with time. The internal structure of the TTBAs could be divided into two layers; .the lower layer was dense and in the upper layer, balls jumped vigorously and their number density was low.
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Keywords: velocity, tennis balls, snow avalanche
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