Via a semi-inverse method of establishing generalized variational principles, two families of variational principles and generalized variational principles for one-dimensional unsteady compressible flow in an imagine plane tau-Psi (defined by tau = t, Psi - path-function) have been deduced. The calculation domain in the image plane has the regular form of rectangle, which gives much advantage of utilizing variational-based FEM or other direct variational methods such as Kantrovich-FEM method to solve the problem. (C) 1998 Elsevier Science Inc. All rights reserved. References: 9
展开▼
