Abstract
Direct formal integration (DFI; Payne [1]) is an analytic-numerical method that has been uniformly successful in solving a large number of nonlinear (NL) and linear physical problems. Applications to Prandtl boundary layer, Navier-Stokes, turbulence, cavity flow, aerodynamics, chaos, Tricomi transsonics and Euler problems have been described (cf. Payne [2] through [8]). Other successes include solid state physics, predator-prey systems, and flight and orbital mechanics. The handling of parabolic and elliptic PDEs is straightforward. One hyperbolic PDE (Tricomi) has been treated. DFI has three stages:
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1.
Formally integrate DEs along one or more trajectories thereby converting the DEs to Volterra-type IEs or IDEs of second kind.
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2.
Study all forms (IEs, IDEs, DEs) for new insights into the problem.
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3.
Solve the equations a) analytically by hand near initial points to discover the solution behavior there and b) numerically upon computer for details.
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References
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Payne, F.R. (2004). Hybrid Laplace and Poisson Solvers. II: Robin BCs. In: Constanda, C., Largillier, A., Ahues, M. (eds) Integral Methods in Science and Engineering. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-0-8176-8184-5_30
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DOI: https://doi.org/10.1007/978-0-8176-8184-5_30
Publisher Name: Birkhäuser, Boston, MA
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