1. Toefficients: a1=0.2131, (~~~0.4364, a3=0.7641 with v=1.1727. Table 1 Comparison of constant-coefficient Runge-Kutta scheme to variable-coefficient Runge-Kutta scheme for Circular Advection on a 40 x 20 grid.
2. Where the wall spacing is set to have an acoustic cell Reynolds number of 10, yielding a stretching parameter, c, of 1.1360.f By employing characteristic boundary conditions, neither second-order boundary conitions30t 31 nor solution-assumed grids32-34 are necessary to capture the boundary layer gradients (see Fig. 9 where athe computed resultsg are compared to the Blasius resultsh).