期刊
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
卷 155, 期 2, 页码 263-284出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0377-0427(02)00869-5
关键词
smoothed particle hydrodynamics; smoothing function; constructing condition; hydrodynamic simulation
This paper presents a general approach to construct analytical smoothing functions for the meshfree, Lagrangian and particle method of smoothed particle hydrodynamics. The approach uses integral form of function representation and applies Taylor series expansion to the SFH function and derivative approximations. The constructing conditions are derived systematically, which not only interpret the consistency condition of the method, but also describe the compact supportness requirement of the smoothing function. Examples of SPH smoothing function are constructed including some existing ones. With this approach, a new quartic smoothing function with some advantages is constructed, and is applied to the one dimensional shock problem and a one dimensional TNT detonation problem. The good agreement between the SPH results and those from other sources shows the effectiveness of the approach and the newly constructed smoothing function in numerical simulations. (C) 2003 Elsevier Science B.V. All rights reserved.
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