The paper is devoted to the numerical study of two-dimensional convective motion a viscoplastic fluid in closed region under lateral heating. problem solved numerically using ANSYS Fluent software. Bulkeley-Herschel model describing behavior was chosen as non-Newtonian model. Under certain rheological parameters, this reduced Newtonian model, which also investigated limit case. Based on results...

This paper studied the cooling performance of a hot electronic chip using nanofluids (NF) mixed convection, implementing Buongiorno’s model NF simulation. The were assumed water-Al2O3 nanoparticles (NP) in range 0 to 4% volume concentration. Six different problems combinations three internal blocks, including triangular, square, and circular geometries, two porous media, sand compact metallic p...

Many numerical methods have been developed for the solution of Poisson and Laplace equations such as finite-difference methods, finite-element methods, boundary-element methods, etc. Sinc numerical methods developed recently by Stenger and co-workers excel over other methods for problems involving singularities, infinite or semi-infinite domains as well as boundary layer behaviors. In this pape...

The deployment of nanocavities may efficiently enhance the light-matter interaction for photonic components on chip. Three nanoscale cavity designs are investigated, including the one-dimensional (1-D) photonic crystal (PhC) nanobeam cavity, inline waveguide-integrated plasmon cavity, and square plasmon resonator embedded in the 1-D PhC nanobeam cavity (i.e., Combo cavity). The cavity performan...

Early erbium and CO2 lasers failed to gain wide acceptance in the dental community because their optical drilling speeds were slower in comparison to the mechanical bur. This has changed in the past few years; much faster ablation speeds are now possible and dental lasers with variable square pulse technology even exceed the drilling speeds of conventional burs. In this paper we report on a cli...

Hyperpolarized (83)Kr surface quadrupolar relaxation (SQUARE) generates MRI contrast that was previously shown to correlate with surface-to-volume ratios in porous model surface systems. The underlying physics of SQUARE contrast is conceptually different from any other current MRI methodology as the method uses the nuclear electric properties of the spin I = 9/2 isotope (83)Kr. To explore the u...

Permeability is one of the most important bulk properties for the characterization of fluid flow in porous media. However, despite all the considerable body of research work over the past years using experimental, analytical, and numerical approaches, its determination is still a challenge. The methodologies, which have been used to measure, calculate and predict the permeability of different t...

Hyperpolarized Kr surface quadrupolar relaxation (SQUARE) generates MRI contrast that was previously shown to correlate with surface-to-volume ratios in porous model surface systems. The underlying physics of SQUARE contrast is conceptually different from any other current MRI methodology as the method uses the nuclear electric properties of the spin I 1⁄4 9/2 isotope Kr. To explore the usage o...

In this study, mixed convection heat transfer and local and global entropy generation in aventilated square cavity have been investigated numerically. The natural convection effect isachieved by a constant heat flux imposed at the bottom wall and cooled by injecting a coldfollow. In order to investigate the effect of port location, four different placementconfigurations of the inlet and outlet ...