Traditional bed shear stress-based models (e.g., Rouse model) derived from the classic parabolic profile of eddy viscosity in open-channel flows fail to accurately predict suspended sediment concentration (SSC) with aquatic vegetation. We developed a two-layer, turbulence-based model SSC profiles emergent vegetated flows. Turbulence generated vegetation, bed, and coherent structures caused by s...

Large-eddy simulation is performed to study the turbulence statistics and flow structures of water past a rotating axial-flow pump under different flow-rate working conditions. A novel sharp-interface level-set based immersed boundary method applied capture complex geometry pump. An unstructured triangular mesh used discretize surface pump, ray-tracing employed classify computational domain int...

By establishing a mathematical model to simulate mixed jet of oxygen and superheated steam from coherent supersonic lance, we studied the effect on fluid characteristics jet. The was initially verified through laboratory experiments prior analyzing in detail. These included velocity, temperature, turbulent kinetic energy (TKE), mass distribution. results showed that, at an ambient temperature 1...

The flow in rivers is turbulent. main parameter related to turbulence the eddy viscosity, which used model a turbulent and involved determination of both velocities sediment concentrations. A well-known largely vertical distribution viscosity free surface flows (open channels rivers) given by parabolic profile that based on logarithmic velocity assumption valid therefore only log-law layer. It ...

Fire-induced turbulence and the feedback into fire, following ambient changes, differ for forested (sub-canopy) grassland environments. Here, we synthesize observations from multiple experimental surface fires: two sub-canopy backing fires, one heading a fire. We identify compare most essential coherent structures processes of each case turbulent momentum fluxes kinetic energy (TKE) budget term...

Through energy conservation and transformation perspectives, we numerically investigated the physical mechanism of cavitation generation surrounding two-dimensional NACA 0015 hydrofoil using mass-transfer model modified-RNG k-epsilon model. Cavitation is triggered by strong turbulent kinetic (TKE) with pressure below saturation pressure. However, development absorbs TKE as phase-change decrease...

determining those in the magnitude of LST changes over the wind farms. In addition, atmospheric stability determines the sign and strength of the net downward heat transport as well as the magnitude of the background TKE. The study highlights the need for better understanding of atmospheric boundary layer and wind farm interactions, and for better parameterizations of sub-grid scale turbulent m...

EmpZoyee-benefit plan8 providing incomemaintenance payments and health expense benefits have enjoyed continuous exparwion since 195& the first year for which the Social Security Administiration collected data for this series. Tke rate of growth in coverage, contributions, and benefits under the plans, however, has slackened in recent years. The following article discusses these developments and...

was not possible, so a thorough examination of the pelvis was performed by the rectal route. At examination, no uterus or ovaries was felt and the vagina appeared to be replaced by a mass of fibrous tissue. She was admitted into the private wing of tKe Hospital for Women, Soho Square, London, for a thorough examination under a general anaesthetic. The hymen was normal, but no vagina could be fo...