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We'll next create the bottom edge corresponding to the nozzle wall. This edge is curved. Since

A = pi Πr²

where r( x ) is the radius of the cross-section at x and

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for the given nozzle geometry, we get

r( x ) = \[(0.1 + x{^}2^)/pi*Π*\]^0.5^; \-0.5 < x < 0.5

This is the equation of the curved wall. Life would have been easier if GAMBIT allowed for this equation to be entered directly to create the curved edge. Instead, one has to create a file containing the coordinates of a series of points along the curved line and read in the file. The more number of points used along the curved edge, the smoother the resultant edge.

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