open access

https://hdl.handle.net/2115/44152

Measurement of electrostatic charge of blowing snow particles in a wind tunnel focusing on collision frequency to the snow surface

英語

2010-10-24

「統合的理解賞」受賞

Blowing snow particles have an electrostatic charge. This charge may be a contributing factor in the formation of snow drifts and snow cornices and changing of the trajectory of particles. In previous studies, the charges measured in fields were larger 10 to 100 times than that measured in wind tunnel. One reason of the gap is speculated to be due to difference of the collision frequency of particles to the snow surface. The purpose of this experiment is to measure the charges of blowing snow particles focusing on the conision frequency and clarify the relationship between them. The experiments were carried out in a cryogenic wind tunnel. Results showed that the particles accumulate negative charges with increase of the coll ision frequency. Assuming an approximation function between the measured charges and the collision frequency, the charges will reach roughly the same value obtained in fields with several hundreds collisions.

会議発表資料

Not Applicable (or Unknown)