Active contours (also known as snakes) have shown their ability to introduce regularity on image segmentation. In contrast with level-set approaches, the active techniques based a contour parameterization are able maintain initial topology of area interest. For this reason, it has been used in recent medical research for diaphragm Most on-line codes 2D/3D segmentation, well built-in Matlab tool...

The shape of the air flow in the interior is heavily influenced by the air distribution system and the way air enters and exits. By numerically simulating flow by computational fluid dynamics, one can determine the flow pattern and temperature distribution and, with the help of the results, provide an optimal design of the air conditioning system. In this study, a chamber was first constructed ...

This study presents an innovative and simple way to increase the rate of heat transfer in a spiral plate heat exchanger model. Several circular cross-section rods, as continuous vortex generators, have been inserted within the spiral plate heat exchanger in the cross-stream plane. The vortex generators are located at various azimuth angles of α=30◦, 60◦, 90◦, and 120◦ with non-dimensional diame...

ABSTRACT-This paper aims to develop a new design of a bentleg (BL) plow and to determine its performance as compared to the conventional one using finite element approach. The difference between the modified and conventional BL plows is the direction of angle between the projection of cutting blade on horizontal plane normal to plow shank and the line perpendicular to the plow shank in the same...

The forward expansion hole improves the film cooling effectiveness by reducing penetration of coolant jet into main flow compared to cylindrical holes. In addition, compound angles improve promoting lateral spreading on a wall. Evidently, combination angle and shaped further adiabatic effectiveness. with 15° expansion, 35° inclination angle, 0° 30° at 0.5 1.0 blowing ratios was numerically simu...

Closed contours are often better perceived than those not fully enclosing an area, i.e., open contours. This facilitation of contour integration by closure, however, has been questioned arguing that in earlier studies closed contours were often "smoother" than open ones, because open contours usually had turning points. To solve this controversy, we compared detection performance for closed cir...

The temperature distribution and distortion of fluid flow inside the closed cavities, square triangle, are studied for different boundary conditions. Two conditions thermal used studying cavities: (i) Left wall is hot, right cold, top bottom walls adiabatic. (ii) adiabatic, hot. For triangular enclosure, vertical insulated, insulated inclined kept cold in both velocity observed by means stream ...

In this present work, simulations were carried out numerically to characterize a porous material. The basic equations, which govern problem, are those of the Navier-Stokes equations coupled with Darcy equation. order understand phenomena at stake, first test was completed on independence mesh compared numerical solution obtained, second is devoted validation (Re <<1). characterization mat...