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题名: A Quasi-Implicit Time Advancing Scheme for Flow in A 3D Curved Duct
作者: Shin-Jye Liang
Yih-Jena Jan
Ching-An Huang
贡献者: 國立臺灣海洋大學海洋環境資訊系
日期: 2013
上传时间: 2018-12-27T01:11:10Z
出版者: Numerical Heat Transfer, Part B
摘要: Abstract: A quasi-implicit time-marching scheme for solving unsteady incompressible three-dimensional flows on cell-centered unstructured meshes is developed. The finite-volume formulation is used for the spatial derivatives, and the flow variables at the cell face are obtained using the pressure correction. The nonlinear equations resulting from the fully implicit scheme are linearized without deterioration of the overall super-linear time accuracy. The system matrices are solved using the CG iterative method, known as the P-BiCGSTAB method for the momentum equation and the P-CG method for the pressure Poisson equation. The model is applied to simulate fully developed laminar flow in both a 90° curved 3-D circular duct and a 90° curved 3-D square duct. Steady solution is obtained in an unsteady time-marching manner. Computed results compare well with experimental data and other numerical results. It is demonstrated that the present method can be applied to unsteady incompressible laminar 3-D flow with a complex geometry on the unstructured grid system.
關聯: 64(4) pp.306-325
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51830
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