When an extended surface is needed on only one fluid side (such as in a gas-to-liquid exchanger) or when the operating pressure needs to be contained on one fluid side, a tube-fin exchanger may be selected, with the tubes being round, flat, or elliptical in shape.
For the heat exchangers heat transfer coefficients and pressure drop are calculated on both fluid sides depending on the geometry, flow conditions and thermal properties using empirical correlations available in literature.
The blade passages, which look like twisted, highly curved airfoils, must exert a tangential force on the fluid with the pressures on one side of the blade higher than on the other.
The selected HEX accomplishes with the specific pressure drops limits on both exhaust gas and working fluid side.
Moreover, the influence of the side walls on the fluid motion and the distance between the walls for which the velocity of the fluid in the middle of the channel is negligible are presented by graphical illustrations.
In order to study the influence of the side walls on the fluid velocity we prepared the diagrams contained in Figures 1 and 2. These diagrams present the velocity field w ( x, y, t ) for three values of the distance x at the bottom plate.
They remembered him as aggressive and tireless, the swaggering menace of his run-up, the India ink mop of Brylcreemed hair ruffled by the breeze and those shoulders broadening to Superman dimensions when he delivered the ball in a fluid, side-on action of textbook beauty.
We assume that the fluid on one side of the interface is inviscid and we discuss two different physical phenomena: bubble dynamics and interfacial motion driven by surface tension (viscous sintering).
