Environmental Fluid Mechanics
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Fine scale structure of convective mixed layer in ice-covered lake
Environmental Fluid Mechanics - Tập 19 - Trang 751-764 - 2018
Nonstationary convection forced by distributed buoyancy sources is a fundamental environmental fluid mechanics process, particularly in ice-covered freshwater waterbodies. In this paper, we present novel field-based results that characterise the diurnal evolution of the main energetics of radiatively-driven convection in ice-covered lakes that is the radiatively-induced buoyancy flux, B, and the k...... hiện toàn bộ
The impact of chemical lateral boundary conditions on CMAQ predictions of tropospheric ozone over the continental United States
Environmental Fluid Mechanics - Tập 9 - Trang 43-58 - 2008
A sensitivity study is performed to examine the impact of lateral boundary conditions (LBCs) on the NOAA-EPA operational Air Quality Forecast Guidance over continental USA. We examined six LBCS: the fixed profile LBC, three global LBCs, and two ozonesonde LBCs for summer 2006. The simulated results from these six runs are compared to IONS ozonesonde and surface ozone measurements from August 1 to ...... hiện toàn bộ
Laboratory studies defining flow regimes for negatively buoyant surface discharges into crossflow
Environmental Fluid Mechanics - Tập 12 - Trang 439-449 - 2012
Surface discharges of negatively buoyant jets into moving ambient water create a range of complex flow patterns. These complexities arise through the interplay between the discharge’s initial fluxes and the motion of the ambient current. In this study a series of laboratory experiments were conducted for negatively buoyant surface discharges into crossflow to investigate flow patterns under differ...... hiện toàn bộ
Experimental study on the discharge characteristics of viscous debris flow with grid-type dam
Environmental Fluid Mechanics - Tập 21 - Trang 1253-1271 - 2021
Experimental tests were conducted on a rectangular flume with different grid-type dam grid sizes, channel slopes and debris flow bulk density. We use the Bernoulli equation of energy conservation to deduce a formula to calculate debris-flow discharge. By combining the flume experiments with dimensional analysis methods, we mainly consider the bulk density of the debris flow, grid size of the grid-...... hiện toàn bộ
Bedload transport for heterogeneous sediments
Environmental Fluid Mechanics - Tập 15 - Trang 731-751 - 2014
A large panel of instruments was deployed in the Eastern English Channel to measure the evolution of bedload fluxes during a tidal cycle for two different sites. The first one was characterized by a sandy bed with a low dispersion in size while the other study site implied graded sediments with grain sizes ranging from fine sands to granules. The in situ results obtained were compared with predict...... hiện toàn bộ
LES validation of lock-exchange density currents interacting with an emergent bluff obstacle
Environmental Fluid Mechanics - Tập 22 Số 5 - Trang 1055-1079 - 2022
Numerical simulations of intrusive gravity currents interacting with a bottom-mounted obstacle in a continuously stratified ambient
Environmental Fluid Mechanics - Tập 17 - Trang 191-209 - 2016
In this study, the flow dynamics of intrusive gravity currents past a bottom-mounted obstacle were investigated using highly resolved numerical simulations. The propagation dynamics of a classic intrusive gravity current was first simulated in order to validate the numerical model with previous laboratory experiments. A bottom-mounted obstacle with a varying non-dimensional height of
...... hiện toàn bộ
Experimental investigation of clear-water temporal scour variation around bridge pier in gravel
Environmental Fluid Mechanics - Tập 18 - Trang 871-890 - 2017
Variation of temporal scour depth around circular piers under clear-water scour condition was studied experimentally for a variability of configuration studies, including different size of circular piers. A total of 96 experiments were carried out with more than 800 data sets of temporal scour depth in non-uniform gravel bed. The experimental data were used to calculate the temporal scour depth at...... hiện toàn bộ
Assessing the Leakage Rates from Punctured Submerged Vessels
Environmental Fluid Mechanics - Tập 5 - Trang 341-355 - 2005
The leakage of fluid leaving a puncture in a pressurized vessel immersed in a quiescent, miscible medium is studied under steady flow conditions. This problem has engineering applications in submerged pipelines and hazardous gas lines. The leakage rate for the puncture is characterized as functions of various hydrodynamic and geometric conditions. Dimensional analysis shows that the leakage percen...... hiện toàn bộ
Hydraulics of shallow shear flows: onset, development and practical relevance
Environmental Fluid Mechanics - Tập 19 - Trang 1121-1142 - 2019
Shallow turbulent flows are omnipresent in hydrosystems. Examples include flows past islands, in river confluences and longshore currents. A characteristic feature of a shallow flow is the existence (under certain conditions) of two-dimensional coherent structures (2DCS). This paper discusses and illustrates the usefulness and limitations of reduced dimensionality models in conjunction with hydrod...... hiện toàn bộ
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