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Use of the splitting scheme and multigrid method to compute flow separation
Author(s) -
Qianshun Chang
Publication year - 1987
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650070704
Subject(s) - multigrid method , mathematics , interpolation (computer graphics) , boundary value problem , flow (mathematics) , cylinder , boundary (topology) , mathematical analysis , geometry , partial differential equation , classical mechanics , physics , motion (physics)
The splitting difference scheme is used to study flow separation. Flows behind a circular cylinder are computed as a model problem. In view of the nature of the flow, the variables are transformed. The boundary condition for the pressure is given from an intermediate velocity. The free‐slip velocity boundary conditions on the rigid wall are given by interpolation. The multigrid algorithm is applied to the pressure iteration. We also choose better initial values for the model problem by means of the multigrid algorithm idea.