Buoyancy driven heat transfer of Cu-water nanofluid in a differentially heated square cavity with an inner adiabatic square baffle at different positions is studied numerically. The left and right walls of the cavity are at temperatures of Th and Tc, respectively that Th > Tc, while the horizontal walls are insulated. The governing equations are discretized using the finite volume method while ...

Although excellent results have been reported on echocardiographic detection of postoperative sequelae after the Mustard procedure (1-3), baffle obstruction cannot definitely be ruled out in certain cases (3). This may be due to a combination of poor echo windows and the complex three-dimensional relationship of the intraatrial structures. Because it seems imperative to rule out baffle patholog...

Forty-nine patients with transposition of the great arteries who underwent a Mustard atrial baffle repair between 1964 and 1971 were assessed late postoperatively. There have been five late deaths: two related to baffle obstruction, two from noncardiac causes, and one sudden and unexpected. Hemodynamic data were available in 42 patients and autopsy in four. Obstruction of the lower venous chann...

In this paper, a solar air collector duct equipped with baffles on back plate was numerically investigated. The Reynolds number (Re) varied from 5000 to 20,000, the angle baffle (a) 30° 120°, spacing ratio (Pr) 2 8, and blockage (Br) 0.375 0.75 examine their effects Nusselt (Nu), friction factor (f), thermohydraulic performance parameter (η). 2D numerical simulation used standard k-ε turbulence...

An antireflection overcoat for opaque baffle coatings in the FIRlsubmillimeter region has been made from a simple Teflon spray-on lubJricant. The Teflon overcoat reduced the specular reflectance of four different c,paque coatings by nearly a factor of two. Analysis, based on the interfElrence term of a reflecting-layer model, indicates that in the submillimeter region the reduced reflectance de...

background and objectives: pomegranate juice (pj) contains large particles that stick to evaporator walls causing off flavors in the concentrate due to burning. microfiltration is used to clarify pj. fouling is a limiting phenomenon that can prevent the industrialization of membrane clarification. changes in the geometry of the membrane module such as using baffles are useful to decrease this p...

We model diffraction errors found when using toothed apertures [L. P. Boivin, Reduction of diffraction errors in radiometry by means of toothed apertures, Appl. Opt. 17, 3323-3328 (1978)]. Using toothed (cf. circular) apertures minimizes diffraction by inducing destructive interference within the diffracted signal. Since diffraction effects can be quite complicated, their over-all reduction may...

In vertical Bridgman (VB) systems, the shape of S-L interface greatly influences yield and perfection single crystal, because continuous contact with crucible. The melt flows are difficult to modify control. Baffles flow-directing or obstructing devices. VB melts, baffles disk shaped, positioned horizontally above solid-liquid (S-L) interface. role baffle is to: i) minimize thermally-driven con...

the effect of γ-al2o3 nanoparticles on heat transfer rate, baffle spacing and pressure drop in the shell side of small shell and tube heat exchangers was investigated numerically under turbulent regime. γ-al2o3-water nanofluids and pure water were used in the shell side and the tube side of heat exchangers, respectively. since the properties of γ-al2o3-water nanofluids were variable, they were ...