Measurements of spray at an air-water interface |
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| Authors: | Chen Sheng Wang Robert L Street |
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| Institution: | Department of Civil Engineering, Stanford University, Stanford, Calif. 94305, U.S.A. |
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| Abstract: | The spray content in the surface boundary layer above an air—water interface was determined by a series of measurements at various feteches and wind speeds in a laboratory facility. The droplet flux density N(z) can be described in terms of the scaling flux density N* and von Karman constant K throguh the equation, N(z)/N* = −(1/K) ln(z/z0d) where z is height above the mean water level and z0d is the droplet boundary layer thickness. N* is given by a unique relationship in terms of the roughness Reynolds number u*σ/ν where σ is the root-mean-square surface displacement. Spray inception occurred for u* 0.3. The dominant mode of spray generation in the present and most other laboratory tests, as well as in available field data, appears to be bubble bursting. |
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