Category 2: Complex Geometry

This paper addresses the Category 2 - Complex Geometry problem, contributed by Pr. Miguel Visbal at the 4th CAA Workshop held at the Ohio Aerospace Institute in Cleveland (OH), on October 20-22, 2003. The problem is the simulation of the scattering, from multiple rigid circular cylinders, of sound generated by a spatially distributed, axisymmetric, acoustic source, by solving the two-dimensional linearized Euler equations. In the proposed solution, the full conservative Euler equations are solved on multi-domain conformal grids associating body-fitted grids near solid walls and quasi-cartesian grids elsewhere. The solutions are favorably compared to the analytical data provided by the contributor of the problem.