A Lattice Boltzmann method is applied to demonstrate the comparison results of simulating natural convection in an open end cavity using different hydrodynamic and thermal boundary conditions. The Prandtl number in the present simulation is 0.71, Rayleigh numbers are 104,105 and 106 and viscosities are selected 0.02 and 0.05. On-Grid bounce-back method with first-order accuracy and non-slip met...

the johor strait is an estuarine system located on the coast of the state of johor in malaysia.the western part of johor strait is a shallow estuarine located between causeway and pulai river. ahydrodynamic model was calibrated based on the environmental fluid dynamic code (efdc) from 4th to 17th of october, 2009. in this calibration, the efdc hydrodynamic model was configured to simulate time ...

Abstract Superparamagnetic iron oxide nanoparticles are a promising material in nanomedicine, especially for generating magnetically controlled drug delivery systems. We developed an innovative ureidopyrimidinone (UPy) coating based on supramolecular hydrogen bonding units. The synthesized possess positively charged surface with hydrodynamic diameter of 177 nm at pH 7 and magnetization 31 emu g...

The proximity interference and the vortex dislocation are fundamental fluid dynamic features that determine a wake pattern of dual-step circular cylinders in side-by-side arrangement. Each cylinder consists two coaxial with different diameters. A complex modulation is expected due to an intrinsic interaction between shedding larger-diameter (LC) smaller-diameter (SC), cross-wake uniform flow. T...

   This research studies the application of essential oil nanoemulsion as herbal medicine instead of using antibiotics and chemicals. Thyme, shirazi thyme and rosemary essential oils were selected as herbal drugs. Essential oil nanoemulsions with Tween 80 and/or Sodium dodecyl sulfate (SDS) surfactants were prepared and investigated. Physicochemical characterizations such as hydrodynamic di...

This paper presents a Computational Fluid Dynamics (CFD) model of pilot scale dissolved air flotation (DAF) tank. A Multiphase Mixture was used to analyse the influence bubble sizes on formation stratified flow structure. Critical diameter is defined as size that implies equality rising velocity and downward in separation zone (SZ). The fact whether using which are greater or less than critical...

The extrinsic physicochemical properties of nanoparticles (NPs), such as hydrodynamic size, surface charge, surface functional group, and colloidal stabilities, in toxicity testing media are known to have a significant influence on in vitro toxicity assessments. Therefore, interpretation of nanotoxicity test results should be based on reliable characterization of the NPs' extrinsic properties i...

INTRODUCTION To investigate the biodistribution and retention properties of the new super paramagnetic iron oxide (new SPIO: mean hydrodynamic diameter, 100 nm) nanoparticles, which have concentrated polymer brushes in the outer shell and are difficult for phagocytes to absorb, and to compare the new SPIO with clinically approved SPIO (Resovist: mean hydrodynamic diameter, 57 nm). MATERIALS A...

The intensity fluctuations of scattered laser light provide a rapid, nondestructive probe of hydrodynamic size and polydispersity of nerve-ending subcellular particles. This method yields information on diffusive and directed motion of secretory granules and synaptic vesicles. It also enables accurate measurements of surface charge properties of isolated granules and plasma membranes. Recently,...

The ionic liquid (IL) 1-butyl-3-methylimidazolium octyl sulfate, [C4mim][C8SO4]mediated micelle to vesicle transition in aqueous solution of a cationic Gemini surfactant(tetramethylene-1,4-bis(dimethylpentadecylammonium bromide) (14-5-14) has beeninvestigated by applying dynamic light scattering (DLS), viscosity, steady state and timeresolved fluorescence and HRTEM measurement f...