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首页> 美国政府科技报告 >CAVEAT: A computer code for fluid dynamics problems with large distortion and internal slip. Revision 1.
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CAVEAT: A computer code for fluid dynamics problems with large distortion and internal slip. Revision 1.

机译：CaVEaT：用于流体动力学问题的计算机代码，具有大的变形和内部滑移。修订版1。

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摘要

This report is a description of the two-dimensional version of CAVEAT, a computer code which solves numerically the equations of transient, multimaterial, compressible fluid dynamics. CAVEAT is written to treat a wide variety of problems. It has the ability, for example, to describe material interfaces and the large slip along interfaces, to describe complex geometries without sacrificing vector processing, and to apply tabular equations of state. Its numerical methods were chosen to minimize numerical diffusion, achieve a high degree of vectorization, and facilitate extension to three dimensions. CAVEAT uses an explicit time-marching, conservative finite-volume numerical technique in which all state variables, including velocity, are cell centered; values at vertices and cell faces are derived. The technique is a variation of the Godunov method that uses an approximate Riemann solver and accommodates arbitrary equations of state. Spatial differencing may either be first order or second order with a choice of limiters of the gradient in an attempt to preserve monotonicity. The formulation is spatially two-dimensional with options for Cartesian and curvilinear geometries. Discretization is achieved with a mesh of arbitrary quadrilateral cells whose vertices can move with time. Arbitrary mesh motion is supported by allowing transport of material between cells according to the Arbitrary Lagrangian-Eulerian technique. This report is a second edition of an earlier report on CAVEAT. Because of the maturity and expanded use of CAVEAT, this report includes new sections directed toward first-time users. We have chosen to document in this report only the hydrodynamics part of the much larger version of CAVEAT.

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