The present examination deals with the effects of nanofluids on corrugated walls under the influence of electromagnetohydrodynamic(EMHD)in the curved channel.The investigation is carried out by water-based nanofluids ...The present examination deals with the effects of nanofluids on corrugated walls under the influence of electromagnetohydrodynamic(EMHD)in the curved channel.The investigation is carried out by water-based nanofluids using copper nanoparticle.Firstly performed the mathematical modelling by applying the method of perturbation,we have evaluated analytical solutions for the velocity and temperature.For the corrugations of the two walls periodic sine waves are described for small amplitude either in phase or out of phase.By using numerical calculations we analyzed the corrugation effects on the velocity and temperature for EMHD flow.The physical effects of flow variables like Hartmann number,Volumetric concentration of nanoparticles,Grashof number,Curvature parameter and Heat absorption coefficient are graphically discussed.Moreover,the effect of Curvature parameter on Stresses and Nusselt number is discussed through tables.The velocity and temperature decrease when the curvature parameter is increased.The electromagnetohydrodynamic(EMHD)velocity and temperature distributions show that 0°is the phase difference between the two walls for in phase and the phase difference is equal to the 180°between two walls for out of phase.The important conclusion is that reducing the unobvious wave effect on the velocity and temperature for a small value of amplitude ratio parameter.展开更多
The cavitation bubble collapse near a cell can cause damage to the cell wall. This effect has received increasing attention in biomedical supersonics. Based on the lattice Boltzmann method, a multiple-relaxation-time ...The cavitation bubble collapse near a cell can cause damage to the cell wall. This effect has received increasing attention in biomedical supersonics. Based on the lattice Boltzmann method, a multiple-relaxation-time Shan–Chen model is built to study the cavitation bubble collapse. Using this model, the cavitation phenomena induced by density perturbation are simulated to obtain the coexistence densities at certain temperature and to demonstrate the Young–Laplace equation. Then, the cavitation bubble collapse near a curved rigid wall and the consequent high-speed jet towards the wall are simulated. Moreover, the influences of initial pressure difference and bubble-wall distance on the cavitation bubble collapse are investigated.展开更多
文摘The present examination deals with the effects of nanofluids on corrugated walls under the influence of electromagnetohydrodynamic(EMHD)in the curved channel.The investigation is carried out by water-based nanofluids using copper nanoparticle.Firstly performed the mathematical modelling by applying the method of perturbation,we have evaluated analytical solutions for the velocity and temperature.For the corrugations of the two walls periodic sine waves are described for small amplitude either in phase or out of phase.By using numerical calculations we analyzed the corrugation effects on the velocity and temperature for EMHD flow.The physical effects of flow variables like Hartmann number,Volumetric concentration of nanoparticles,Grashof number,Curvature parameter and Heat absorption coefficient are graphically discussed.Moreover,the effect of Curvature parameter on Stresses and Nusselt number is discussed through tables.The velocity and temperature decrease when the curvature parameter is increased.The electromagnetohydrodynamic(EMHD)velocity and temperature distributions show that 0°is the phase difference between the two walls for in phase and the phase difference is equal to the 180°between two walls for out of phase.The important conclusion is that reducing the unobvious wave effect on the velocity and temperature for a small value of amplitude ratio parameter.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11674173,81627802,11474161,11374155 and 11474001the Qing Lan Project
文摘The cavitation bubble collapse near a cell can cause damage to the cell wall. This effect has received increasing attention in biomedical supersonics. Based on the lattice Boltzmann method, a multiple-relaxation-time Shan–Chen model is built to study the cavitation bubble collapse. Using this model, the cavitation phenomena induced by density perturbation are simulated to obtain the coexistence densities at certain temperature and to demonstrate the Young–Laplace equation. Then, the cavitation bubble collapse near a curved rigid wall and the consequent high-speed jet towards the wall are simulated. Moreover, the influences of initial pressure difference and bubble-wall distance on the cavitation bubble collapse are investigated.
