The tensile force along a cylindrical lipid bilayer tube is proportional to the membrane's bending modulus and inversely proportional to the tube radius. We show that this relation, which is experimentally exploited to measure bending rigidities, can be applied with even greater ease in computer simulations. Using a coarse-grained bilayer model we efficiently obtain bending rigidities that comp...

Abstract The paper presents the results of numerical particle-in-cell simulation positron bunch focusing during acceleration in a plasma dielectric wakefield accelerator. is excited by drive electron quartz tube, embedded cylindrical metal waveguide. internal area tube filled with having general case paraxial vacuum channel. Two different models density radius-relationship are investigated: hom...

This paper deals with the study of ureteral peristalsis in cylindrical tube through porous medium. In reality, there are solid particles present in the flow, but it is necessary to understand the behaviour of the fluid flow. The flow is analyzed for a single traveling wave in an axisymmetric tube with an incompressible, Newtonian fluid. The wavelength of the traveling wave assumed to be large. ...

Plants of Zea mays were grown with their roots confined to growing tubes, consisting of cylindrical or spherical glass tubes fitted at the bottom with a stopcock. Nutrient solution was circulated past the roots, and when a plant was 21 to 25 days old, the stopcock was closed, the root excised from the plant and connected to an apparatus which measured root pressure and exudation volume flow rat...

Fluorescence has been observed directly across the band gap of semiconducting carbon nanotubes. We obtained individual nanotubes, each encased in a cylindrical micelle, by ultrasonically agitating an aqueous dispersion of raw single-walled carbon nanotubes in sodium dodecyl sulfate and then centrifuging to remove tube bundles, ropes, and residual catalyst. Aggregation of nanotubes into bundles ...

in this paper, newton harmonic balance method (nhbm) is applied to obtain the analytical solution for an electron beam injected into a plasma tube where the magnetic field is cylindrical and increases towards the axis in inverse proportion to the radius. periodic solution is analytically verified and consequently the relation between the natural frequency and the amplitude is obtained in an ana...

In many industrial equipment such as boilers and heat exchangers, the cylindrical tubes are exposed to the gas- liquid two phase flow. For any immersed body in flow field vortex shedding is created with a frequency that may be constant or variable, according to conditions such as flow rates, geometry of body, and etc. The failure will happen in the equipment, when this frequency is close to...

This study investigates the pool boiling heat transfer of water over cylindrical heating tubes for different orientations and surface roughness tubes. First, two a smooth tube, horizontal vertical, were used in chamber. For given flux, coefficient achieved with tube was always higher than that vertical tube. To investigate influence roughness, rough fully outer developed through metal etching p...

Borehole waves are strongly affected by adjacent porous zones or by fractures intersecting the borehole. A theoretical description for both porous and fracture zones is possible based on the introduction of an effective borehole fluid bulk modulus, characterizing the wave attenuation via borehole wall impedance. This impedance can be calculated for both porous and fracture zones adjacent to the...