A new bulk model of the convective boundary layer, the probabilistic bulk convection model (PBCM), is presented. Unlike prior bulk approaches that have modeled the mixed-layer-top buoyancy flux as a constant fraction of the surface buoyancy flux, PBCM implements a newmixed-layer-top entrainment closure based on the mass flux of updrafts overshooting the inversion. This mass flux is related to t...

Each down stroke of an insect's wings accelerates axial airflow over the antennae. Modeling studies suggest that this can greatly enhance penetration of air and air-born odorants through the antennal sensilla thereby periodically increasing odorant-receptor interactions. Do these periodic changes result in entrainment of neural responses in the antenna and antennal lobe (AL)? Does this entrainm...

We present the results of a combined experimental and numerical study free-surface flow behind finite height rigid vertical cylinder. The experiments measure drag wake angle on cylinders different diameters for range velocities corresponding to 30,000 <Re< 200,000 0.2<Fr<2 where Reynolds Froude numbers are based diameter. three-dimensional large eddy simulations use conservative lev...

A hydraulic jump is the sudden transition from a high-velocity impinging flow into a turbulent roller in an open channel. Substantial amounts of air are entrapped at the impingement point, and significant free-surface fluctuations take place above the roller. In the present study, some physical modelling was conducted in a relatively large sized facility. The flow conditions included a wide ran...

Plume rise is a key variable in air quality modelling. The plume rise model implemented in CSIRO’s The Air Pollution Model (TAPM) was implemented in MATLAB, and the plume rise through modelled and observed boundary layers compared for an overnight strongly stable period. Contrary to expectations, the plume rise height was similar in the modelled and observed boundary layers despite a large diff...

An experimental and numerical investigation of the structure of plane underexpanded turbulent air jets in water was conducted to characterize their structure and mixing properties. Measurements included void fraction profiles, static pressure distributions, entrainment rates, and high speed flow visualization. A locally homogeneous flow model was also developed with compressibility effects trea...

Both RaNS (Reynolds-averaged Navier-Stokes) and DES (Detached Eddy Simulation) type turbulence models were used in conjunction with a two-fluid model of bubbly flow and a new subgrid air entrainment model to predict air entrainment and transport in a hydraulic jump. It was found that the void fraction profiles predicted by both methods are in agreement with the experimental data in the lower sh...