Three dimensional numerical simulation of compressible fluid flow with material interfaces

The paper describes a solution of three dimensional unsteady problems in th e field of compressibe fluid dynamics. A similar procedure to that adopted in two dimensions is used whereby one starts on a Lagrangian code and chang es over to an Eulerian one when the motion of the fluid becomes such as to give significant mesh distortion. For the Lagrangian calculations reported here, the DYNA3D program from Livermore has been used. At a suitable time t he calculation is transferred to an Eulerian code, NUTMEG, written by the a uthors. A key feature of this code is the interface tracking procedure whic h has successfully been applied to complex problems involving many material interfaces. The main features of NUTMEG are described and examples are giv en of the use of the Lagrangian/Eulerian procedure.