A CLOUD DROPLET CAMERA.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Pagination or Media Count:
The problems encountered in measuring the size distribution of water droplets by impactor may be solved by making in situ photographs of air-suspended droplets. Exposure must be sufficiently short to stop the moving droplets and is accomplished by using electronic strobes having a nominal duration of about 1.2 microsec at medium range. The almost linear relationship, up to 200 microns, between actual droplet size and ring diameter was determined from photographs of droplets suspended by fibers and droplets produced by an atomizer. Camera and impactor results of size distribution in atomizer generated fog, steam fog and natural fog are summarized. Comparing the advantages and disadvantages of previously developed photographic, electronic, and laser apparatus the present procedure may result in a standard method of cloud or fog observation. Author