Water channel experiments show that plume rise associated with relatively low-level buoyant sources in urban areas is highly affected by the complex flows induced by surrounding buildings, an effect which current plume rise models are not able to accurately reproduce.
For a neutrally buoyant gas source term with urban meteorology, we compare near-surface dosage values within several kilometers of the release during the first half hour, before the gas is dispersed beyond the critical lethal level.
At first, Magdy had been a source of buoyant optimism, and perpetual energy: by night, he'd join in the clashes against Mubarak's thugs; by day, he spirited around Tahrir jotting down any jokes he heard.
Some of the attributes of CALPUFF are especially pertinent to conditions associated with CAFOs: variable wind directions, calm-wind algorithm, buoyant area and line sources, nonuniform land patterns, and multifacility applications.
Yet America has depended particularly heavily on buoyant house prices as a source of jobs and cash that can be extracted through equity withdrawals.Even if prices do fall in some regions, forecasters do not yet think that will trigger a recession.
Normalized widths of the nonbuoyant flames were constant for Re ≥ 100, whereas buoyant flame widths scaled with source Froude number.
Results for mixing show that the high momentum of the inlet flow promotes a homogeneous temperature field due to a large recirculation zone formed downstream the buoyant plume above the heat source.
While the appropriate length scale for the plume at the vent may differ from the crater size, the results are not greatly affected by the choice of radius of the plume at the source as, for buoyant plumes, increasing the source radius can be compensated by decreasing the source velocity since the source mass flux has the dominant control on the plume height (Sparks et al. 1997).
This technique allows us to investigate the dispersion of buoyant emissions from low-level sources in urban areas through water channel or wind tunnel simulations.
The measurements were made for a single buoyant and non-buoyant model plume source discharged from a stack with two exit velocities in neutral, suburban terrain roughness turbulent wind flows.
