A numerical simulation study was carried out to investigate a steady two-dimensional laminar natural convective heat transfer from uniformly heated inner circular cylinder placed inside an air-filled square enclosure with porous material. The enclosure’s side and upper walls were isothermal, while the bottom wall adiabatic. All calculations performed in range of Rayleigh numbers between 103 107...

Numerical investigation of mixed convection flow in a concentration-stratified fluid-saturated vertical square porous enclosure is investigated by Galerkin finite element method. The forced flow conditions are imposed by providing an inlet at the bottom wall and an outlet with a suction on the top wall. The free convection is induced by introducing a hot but isothermal temperature on the left v...

A vehicular Ad-Hoc Network is a technology used to array and forming a collection from separate part realtime speed & position information on own vehicles to optimize signal control at crossroads. Today VANET used mainly for the design for the public security the individual comforts, travelers information, traffic organization, traffic coordination and assistance etc. Today’s many of the things...

A simple technique for the measurement of the shielding efficiency of a symmetric enclosure is presented. It allows measurements in the symmetry plane of the enclosure without the need of introducing cables which could interfere with the results. Comparisons with simulation results are shown. Limits of the concept of shielding efficiency of enclosures at high frequencies are also briefly discus...

None of the usual floating point numerical techniques available for solving the quadratic matrix equation AX +BX +C = 0 with square matrices A,B, C and X, can provide an exact solution; they can just obtain approximations to an exact solution. We use interval arithmetic to compute an interval matrix which contains an exact solution to this quadratic matrix equation, where we aim at obtaining na...

Thermomagnetic convection in a differentially heated square cavity with an infinitely long third dimension is numerically simulated using the single relaxation time lattice Boltzmann method LBM . This problem is of considerable interest when dealing with cooling of microelectronic devices, in situations where natural convection does not meet the cooling requirements, and forced convection is no...

None of the usual floating point numerical techniques available for solving the quadratic matrix equation AX +BX +C = 0 with square matrices A,B, C and X, can provide an exact solution; they can just obtain approximations to an exact solution. We use interval arithmetic to compute an interval matrix which contains an exact solution to this quadratic matrix equation, where we aim at obtaining na...

A combined numerical and experimental study is reported of solid/liquid phase change in porous media with natural convection in the melt region. The model is based on volume averaged transport equations, while phase change is assumed to occur over a small temperature range. Experiments are performed in a vertical, square enclosure using gallium and glass beads as the fluid and the porous matrix...

On my block, it's like the world don't exist. We stay confined to this small little section with dividends," proclaims hip-hop artist Scarface in his composition "On My Block." From the perspective of the artist, then, his neighborhood, figured adequately as a block, takes on the qualities of a corporeal, three-dimensional square: one both confining and small. The impression of the artist, voic...