Abstract: I prove that in a steady velocity field the frequency spectrum of a conservative scalar is unaffected by flow distortion. This is a good approximation in turbulent flow if (qa1/3;/U1l1/3;) ? 1, where q and l are velocity ...

Abstract: No abstract availble.

Abstract: Recent large-eddy simulations of the vertical diffusion of a passive, conservative scalar through the convective boundary layer (CBL) show strikingly different eddy diffusivity profiles in the ?top-down? and ?bottom-up? ...

Abstract: We present a theory for probe-induced flow distortion which is applicable in the atmosphere at heights greater than about 10 times the obstacle size. We use the theory to calculate the behavior of Reynolds shear stress and ...

Abstract: The conventional theory of the scattering of transmitted acoustic, microwave, and optical radiation by turbulence uses the refractive index structure-function parameter CN2. The authors calculate the vertical profiles of ...

Abstract: The refractive index structure parameter CN2 has contributions from the temperature and humidity structure parameters Cr2 and CQ2 and from the joint structure parameter CTQ. We briefly review the behavior of these structure ...

Abstract: Design data and experimental results are presented for an eight-pole optimally flat filter which makes available the first seven derivatives of the filtered input signal.

Abstract: By using a simple physical model of the baroclinic convective planetary boundary layer, the similarity functions of the geostrophic drag law are expressed as sums of a barotropic part, dependent only on the stability and ...

Abstract: Lumley's model for interpreting frequency spectra of streamwise velocity in high-turbulence level flows assumes 1) that the convection velocity fluctuations and the convected finestructure are statistically independent, ...

Abstract: A second-order turbulence model is used to study the stable boundary layer (SBL). Over a horizontal surface, a constant surface cooling rate drives the SBL to a steady state within a few hours. Parameterizations are developed ...