部分段階法の自由表面流れ問題への応用

概要

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In the first part of this paper, the fractional step method to solve the two- dimensional Navier-Stokes Equations for incompressible viscous fluid flow is presemited. The developed code is validated by some simple flow programs such as the rfylor.Greelm problem of decaying vortices or the driveim cavity flow problem. rfile extensiomi of time method to free surface flow problems is then made. Issues such as grid generation, free surface boundary conditions and movement of the free surface iii time are addressed. The troubles encountered in time application of the method to free surface flow problem are discussed and some recommemidatiomis for computaion of time free surface flow using the fractional step method are made. Following these recommendations, the numerical method based on the MAC nietliod is applied to free surface problems in the second part of the paper. The boundary and initial conditions for tile generation of periodic progressive waves are discussed. rilhie computational results show that the wave that has time given wave length arid frequency caim be generated by tile proper boundary and initial conditions.
独立行政法人海上技術安全研究所の論文
1990-07-30