In order to investigate the influence of 3D morphology parameters of marble joint surface on its mechanical and seepage characteristics, artificial joints of coarse-grained marbles were scanned by Tianyuan OKIO-typed 3D laser scanner; and then, the professional software was used to obtain the 3D morphology parameters of marble joint surface. Tests of water flowing through a single joint were co...

asymptotically exact and nonlocal third order nonlinear evolution equations are derivedfor two counterpropagating surface capillary gravity wave packets in deep water in thepresence of wind flowing over water.from these evolution equations stability analysis ismade for a uniform standing surface capillary gravity wave trains for longitudinal perturbation. instability condition is obtained and g...

We propose a method for photoacoustic flow measurement based on the Doppler effect from a flowing homogeneous medium. Excited by spatially modulated laser pulses, the flowing medium induces a Doppler frequency shift in the received photoacoustic signals. The frequency shift is proportional to the component of the flow speed projected onto the acoustic beam axis, and the sign of the shift reflec...

As air is injected into a flowing liquid, the resultant bubble characteristics depend on the properties of the injector, near-wall flow, and flowing liquid. Previous research has shown that near-wall bubbles can significantly reduce skin-friction drag. Air was injected into the turbulent boundary layer on a test section wall of a water tunnel containing various concentrations of salt and surfac...

This paper presents a real-time water simulation framework with respect to wave propagation in flowing liquids. The presented method is based on the coupling of liquid flow simulation and simulation of surface waves. Physically, our system combines the solution of the Navier-Stokes Equations with the solution of the 2D Wave Equation. Numerically, we combine the concept of wave particles with a ...

The overwhelming obstacle to the use of conventional chlorine oxidants is the nature of surface water. Surface water is the most common method of water collection and distribution in this country. Lakes, ponds and flowing sources have been the mainstay of water sourcing in this country for decades. By the very nature of surface collection, the concentration of contaminants within these sources ...

Water quality in many stream catchments and river basins is severely impacted by nutrient enrichment as a result of agriculture. Water-resource managers worldwide are considering the potential role of riparian zones and floodplain wetlands in improving stream-water quality, as there is evidence at the site scale that such wetlands are efficient at removing nutrients from through-flowing water. ...

Infectious diarrhoea is an intestinal disturbance caused by a pathogenic microbe. One of the body's responses to such an infection is to try to flush the microbe out of the intestine. This occurs by water flowing from the body into the intestinal space and by increased intestinal muscle contractions. With more water in the intestine and the content travelling more quickly, the person experience...

The properties of water confined inside nanotubes are of considerable scientific and technological interest. We use molecular dynamics to investigate the structure and average orientation of water flowing within a carbon nanotube. We find that water exhibits biaxial paranematic liquid crystal ordering both within the nanotube and close to its ends. This preferred molecular ordering is enhanced ...