Further results from a laboratory model of the convective planetary boundary layer
Tóm tắt
The turbulence in a laboratory convective mixed layer is probed more extensively than in the preliminary study of Willis and Deardorff (1974), and results presented. Turbulence intensities, spectra and probability distributions using mixed-layer scaling compare favorably with similarly scaled field measurements not available or plentiful in 1974. However, the velocity spectra in the convection tank exhibit only a short inertial subrange due to the close proximity of the dissipation subrange to the energy-containing range. The turbulence budget suggests that the convergence of the vertical transport of pressure fluctuations is a rather important term. Results on the entrainment rate are also presented, using both mixed-layer scaling and local interfacial scaling.
Tài liệu tham khảo
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