Swirling impinging jet (SIJ) is considered as an effective means to achieve uniform cooling at high heat transfer rates, and the complex flow structure its mechanism of enhancing have attracted much attention in recent years. The large eddy simulation (LES) technique employed analyze fields swirling non-swirling emanating from a hole with four spiral straight grooves, respectively, relatively R...

the monolithic catalytic converter is still the main pollution control device for modern vehicles in order to reach the ever-increasing legislative demands for low emission standards. the catalytic converters require a large expansion from the exhaust pipe to the front face of the monolith. unfortunately, packaging constraints often do not permit the use of long diffusers. hence, flow separatio...

The present investigation emphasises a new attempt at the peristaltic mechanism of Eyring Powell fluid through non-uniform channel. analysis is performed in presence wall properties under influence variable liquid properties, and flow problem mathematically developed. channel walls are subjected to no-slip conditions with long-wavelength low Reynolds-number approximations employed study. nonlin...

Film cooling is a cooling technique widely used in highperformance gas turbines to protect the turbine airfoils from being damaged by hot flue gases. Motivated by the need to further improve film cooling in terms of both cooling effectiveness and coolant coverage area, the mist/air film cooling scheme is investigated through experiments in this study. A small amount of tiny water droplets (7% w...

Use of amphiphilic triblock copolymers to direct the organization of polymerizing silica species has resulted in the preparation of well-ordered hexagonal mesoporous silica structures (SBA-15) with uniform pore sizes up to approximately 300 angstroms. The SBA-15 materials are synthesized in acidic media to produce highly ordered, two-dimensional hexagonal (space group p6mm) silica-block copolym...

We examine the effects of three basic but effective control strategies, namely uniform blowing, suction, and body-force damping, on intense Reynolds-stress events in turbulent boundary layer (TBL) developing suction side a NACA4412 airfoil. This flow is subjected to non-uniform adverse pressure gradient (APG), which substantially modifies its turbulence statistics with respect zero-pressure-gra...

BACKGROUND Wall stress calculated using finite element analysis has been used to predict rupture risk of aortic aneurysms. Prior models often assume uniform aortic wall thickness and fusiform geometry. We examined the effects of including local wall thickness, intraluminal thrombus, calcifications, and saccular geometry on peak wall stress (PWS) in finite element analysis of descending thoracic...

natural convection between vertical parallel plates occurs frequently in applications such as solar collectors and cooling of electronic instruments. the problem is a two dimensional developing buoyant flow. in this work, the two dimensional conservation equations are solved numerically for constant wall temperature and constant wall heat flux. the results for the local nusselt number at the du...