Abstract: A Cartesian/triangular hybrid grid technique is presented for simulating complex inviscid flowfields, where the triangles are limited only close to the solid wall to describe arbitrary complicated curve boundaries,while the Cartesian grids cover almost entire area of interest. A hybrid solver is developed by coupling the non-oscillatory, non-free-parameter dissipative (NND) finite difference scheme and the NND finite volume scheme naturally to match Cartesian/triangular hybrid grids. The present method inhe...