Positively charged water-solid interfaces are prepared by adsorption of a cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDADMAC) from aqueous solutions to planar silica substrates. These substrates characterized atomic force microscopy (AFM), optical reflectivity, and streaming current measurements. By tuning the amount adsorbed polyelectrolyte, surface charge substrate can b...

the aim of the present study was to investigate the influence of nozzle configurations on spray drift and explain the influences using several atomization characteristics (length of spray sheet, spray angle, velocity distribution of flow field, fluctuation of velocity, and droplet size). nozzles manufactured by one company (lechler gmbh, germany) were tested by spraying local tap water in a win...

Understanding the statistics of bedload particle motions is great importance. To model hop events which are defined as trajectories particles moving successively from start to end their motions, recently, Wu et al. ( Water Resour. Res. , vol. 56, 2020, p. e2019WR025116) have successfully performed individual-based simulations according Fokker–Planck equation for velocities. However, analytical ...