In previous work involving the evaporation of free falling waterdrops subjected to forced convection, Kinzer and Gunn set the droplet temperature equal to the ambient wet-bulb temperature for data reduction. The standard wet-bulb temperature is based on tables prepared from experimental data, and it might be somewhat higher than the equilibrium surface temperature, for it is affected by heat conduction along the stem of the thermometer. Thus, droplet temperatures used previously were somewhat high, and the error became larger as the droplet size (velocity) decreased. This argument would provide an explanation for the lack of evidence of a ventilation effect on droplets smaller than 100 mu in diameter but does not contribute to an understanding of the larger-than-expected ventilation effects for droplets somewhat larger. 8 pp. Ref.
This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.
Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/research-integrity.
The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.