in this work, the steady and laminar mixed convection of nanofluid in horizontal concentric annulus withrotating inner cylinder is investigated numerically. the inner and outer cylinders are kept at constanttemperature ti and to respectively, where ti>to. the annular space is filled with alumina-water nanofluid.the governing equations with the corresponded boundary conditions in the polar coord...

Fission of micron-size charged droplets has been observed using optical methods, but little is known about fission dynamics and breakup smaller nanosize that are important in a variety natural industrial processes. Here, spontaneous individual aqueous nanodrops formed by electrospray investigated charge detection mass spectrometry. processes ranging from formation just two progeny 2 ms to produ...

Layek and Pati (Phys. Lett. A, 2017) studied a nonlinear system of five coupled equations, which describe thermal relaxation in Rayleigh-Benard convection Boussinesq fluid layer, heated from below. Here we return to that paper use techniques dynamical systems theory analyse the codimension-one Hopf bifurcation codimension-two double-zero Bogdanov-Takens bifurcation....

A dilute random distribution of identical elastic spheres in a poroelastic isotropic matrix obeying Biot’s theory is considered. Using Luppe, Conoir and Norris (LCN) multiple scattering formula up to the corrective second order term concentration, approximations are sought low frequency domain (Rayleigh limit) for fast slow effective wavenumbers. The contribution – which contains coupling (i.e....

Combination of porous media and nanofluids is used to improve heat transfer around a vertical finned cylindrical antenna generating high flux. This technique ensures correct operation this electronic device under the conditions recommended by manufacturers. active component enclosed inside another concentric quasi-cylindrical cavity maintained at low temperature. Cooling carried out via highly ...

In the framework of gauge/gravity duality, and in particular $AdS_3/CFT_2$ correspondence, we study one-dimensional superconductors analyzing dual (1+2)-dimensional gravity presence Einstein-power-Maxwell non-linear Electrodynamics. probe limit compute critical temperature transition as a function mass scalar field. The computation is performed analytically employing Rayleigh-Ritz variational p...

In this paper a numerical investigation is performed to study the effects of different nanofluids on convective heat transfer enhancement in a partitioned square cavity subject to different shapes of nanoparticle using water-SiO2 nanofluid. This study has been carried out to analyze the effects of SiO2 nanoparticle, its volumetric fraction between 2 and 4%, and nanoparticle shape (i.e. blades, ...

Compared to bulk waves, Rayleigh waves can propagate much longer distances with lower signal attenuation levels, which are nominally proportional to r / 1 for a given frequency (r=distance). In addition to the small attenuation, Rayleigh waves are also non-dispersive and sensitive to surface-breaking defects. The surface penetration depth of Rayleigh waves is also approximately one wavelength, ...