We numerically study the long-term evolution of the accretion disc around the neutron star in a coplanar Be/X-ray binary with a short period and a moderate eccentricity. From three dimensional Smoothed Particle Hydrodynamics simulations, we find that the disc evolves through three distinct phases, each characterized by different mass accretion patterns. In the first ”developing phase”, the disc...

A two-dimensional, single-phase, isothermal, multicomponent, transient model is built to investigate the transport phenomena in unitized regenerative fuel cells (URFCs) under the condition of switching from the fuel cell (FC) mode to the water electrolysis (WE) mode. The model is coupled with an electrochemical reaction. The proton exchange membrane (PEM) is selected as the solid electrolyte of...

the present work is an experimental study of steady state convective heat transfer of de-ionized water with a (0.04% by volume) volume fraction of al2o3 nanoparticles dispersed to form a nanofluid that flows through an aluminium tube.laminar fully developed flow heat transfer coefficient of al2o3 nanoparticles are dispersed in water in circular tube is discussed in this paper. in order to valid...

Heat and mass transfer phenomena in annular liquid jets are analyzed at high Reynolds numbers by means of a model derived from the governing equations that takes into account the e€ects of surface tension and boundary conditions at the gas± liquid interfaces and the large di€erences between the thermal and mass di€usivities, densities, dynamic viscosities, and thermal conductivities between gas...

The output power of PV module varies with module temperature, solar insolation and loads. And in order to quickly and accurately track the sun, it is necessary to track the maximum power point (MPP) all the time. After studying various algorithms, a new algorithm was presented in this paper based on online short-circuit current,opencircuit voltage, and variable step of perturbation and observat...

It was theoretically shown that impedance-like effects, called retroactivity, in biomolecular circuits can significantly impact the behavior of a system. In this paper, we quantify the effect of retroactivity on the transfer function of a phosphorylation system after linearization of its nonlinear model about a steady state. Our analysis shows that retroactivity shifts the poles of the transfer...