Ice particle generation during evaporation


Dong Y., Oraltay R. G. , Hallett J.

ATMOSPHERIC RESEARCH, cilt.32, ss.45-53, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 32
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/0169-8095(94)90050-7
  • Dergi Adı: ATMOSPHERIC RESEARCH
  • Sayfa Sayıları: ss.45-53

Özet

Simulated soft hail (graupel) particles are grown in a laboratory chamber and evaporated under controlled conditions of wind speed, temperature and undersaturation. Particle breakup is observed directly and recorded by video, and also inferred from abrupt changes of charge. A particle with a diameter of a few mm may give rise to several hundred particles under some conditions. Breakup occurs by irregular evaporation of the rime branches, which thin to less than 10 mu m prior to fracture. Break up is also observed during evaporation of individual faceted vapor grown crystals. All ice particles are strong; the fracture strength is estimated to be at least ten times the bulk fracture strength of ice.