Bulk transfer velocity to and from natural and artificial surfaces

✍ Scribed by Fernanda Trombetti; Marina Caporaloni; Francesco Tampieri

• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 564 KB
• Volume: 14
• Category: Article
• ISSN: 0006-8314
• DOI: 10.1007/bf00121897

✦ Synopsis

A wide set of published mass and heat transfer data is reviewed in terms of the stochastic renewal theory. A simple model is then proposed describing the transfer in terms of the fluid bulk properties. Two expressions are presented and they enable us to evaluate the bulk transfer velocity as a function of the turbulence of the flow for smooth and fully-rough surfaces in large ranges of Schmidt (or Prandtl) and Reynolds numbers. The transfer over transitional surfaces can also be evaluated by using a simple criterion for the choice of the right expression. The proposed relationships agree satisfactorily with data from laboratory and atmospheric measurements, for both solid and liquid surfaces.