On the Evaporation of a Moving Small Liquid Particle

[摘要] The small particles of the sea water which were made by means of specially constructed spray equipment at the rate of 10c.c. per second were introduced into an air tunnel having an air current velocity of 1.3m per second and a length of about 3 metres. Then, in the air tunnel, these small particles were caught at three positions along the horizontal line of 50cm in length under the central line of the tunnel, on thin oil films laid on plate glasses.The dimension of the fallen particles caught on the thin oil film on the glass were measured by ocular-micrometer and mechanical stage equipped on the low power micrometer. Let it be d cm.On the other hand, let d0 cm be the dimension of the particles which were separated from the nozzle of the spray equipment on supposition that the particles were fallen on the above mentioned positions at the resultant velocity which was composed of the terminal velocity and the air current velocity in the tunnel.From the above two values d and d0 the percentage of evaporation of the particle e=(_??_/d0)×100% was obtained.On the result, the apparent percentage of evaporation at the distance of D=92cm, D=159cm, and D=206cm from the nozzle of the spray equipment were 77.5%, 82.6%, and 90.3%, respectively.

[学科分类] 大气科学