Harry E. Schulz, André L. A. Simões, Johannes G. Janzen
Abstract: The one-dimensional mass transfer in turbulent flows is considered. The closure problem related to the mean product between concentration and velocity fluctuations is treated by using random square waves. This approximation allows us to represent the statistical variables of turbulent mass transfer as depending on a finite set of basic parameters. The number of equations needed is then limited by the number of basic parameters used. The analysis is applied, in this study, to the interfacial mass transfer at air-water interfaces, generating a closed set of three equations involving three unknown functions. The resulting differential equations are nonlinear. A simplified example is solved.
Key Words: Statistical turbulence, one-dimensional mass transfer, random square waves.
"In 2010, the 6th International Symposium on Gas Transfer at Water Surfaces (GTWS-6) was held at Kyoto University in Kyoto, Japan. The GTWS-6 included 3 invited plenary lectures, 8 keynote lectures, 69 oral and 25 poster presentations from more than 15 countries. Furthermore, we set up a special session supported by the Core Research for Evolutional Science and Technology (CREST). From these presentations, we selected 49 papers for this volume." (excerpt from the preface).
