Solution Manual for Convection Heat Transfer Fourth Edition By adrian bejan Pdf

Solution Manual for Convection Heat Transfer Fourth Edition By adrian bejan Pdf, Is obtained by shifting y and (1 -y) from the eh,2 alternative (19). Graphicallythis is just like superimposing on the attached figure another pair of curves (for instance,!) Which would be the mirror image of this eb,2 curves (the mirror is that the y = 1/2 vertical line). On the composite chart that resultswe hunt the layout (plank position y) which leads to the cheapest eh,! The Solution depends upon whether the board substrate is a Fantastic conductor:
A) When B is of the order of 1 or bigger, the eh,1 and eh,2 curves are bell shaped and drop on top of one another. The lowest temperatures have been enrolled at y = 0 and y = 1, i.e. if the board is placed near one of those coated walls of the station. The worst place is at the center of the station, y = 1/2, in which the maximum temperature increase (0h, ·or eb,2) is roughly four times larger than if the board is mounted near one of those insulated walls.
B ) When the board is a poor thermal conductor, for example B is bigger than the sequence of 1, then eh.I and eh 2 tsp intersect forming a cusp (a V-shaped valley) at y = 1/2. That intersection corresponds to the bottom (eh,I= eh,2) values, suggesting the very best place for the plank is along the midplane of the D x L station.

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