A time-dependent incompressible viscous BEM for moderate Reynolds numbers

摘要: The boundary element method is applied to transient viscous incompressible flow. time-domain formulation allows a boundary-only solution for linear Stokes For higher speed flows in which the non-linear convective effects cannot be ignored, volume integral must retained. However, introduction of reference velocities often limits region vicinity obstacles or bounding surfaces. Additionally, terms are rewritten eliminate need calculation velocity gradients. A general purpose numerical implementation this new then produces very attractive tool engineering analysis. This includes Newton-Raphson algorithm, permitting accurate solutions up moderate Reynolds number range. Several examples provided validate present approach.