variavel0=<b>João L. F. Azevedo</b> - azevedo@iae.cta.br Centro Técnico Aeroespacial
<b>Edson Basso</b> - basso@iae.cta.br ITA
<b>Abstract.</b> A  study  of mesh  refinement  for overset  structured multiblock grids  is performed  in  the present work. The  refinement  process is based on the Adaptive Mesh Refinement (AMR) method. The increase in grid density is achieved through the application  of Chimera  grid  techniques.  The  use  of  the Chimera  grid  ideas allows  the  creation of new mesh blocks only  in  the  regions of  interest. Regions, which require grid refinement, are identified through the definition of a sensor based on flow property gradients.  For the applications of interest in the present case, flowfields are simulated using the Euler equations. The equations are discretized  by a finite difference method in which spatial discretization uses 2nd-order, central difference operators, together with adequate  scalar, non-linear, artificial dissipation models. Results are presented for supersonic air inlets and the numerical data is compared  to analytical solutions of the problem.
<b>Keywords.</b> Adaptive mesh refinement, Chimera grids, Computational Fluid Dynamics.