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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 6 - MARITIME HYDRAULICS AND COASTAL ENGINEERING : Numerical Simulation of Incompressible Viscous Flow Based on Adaptive Quadtree Mesh
Numerical Simulation of Incompressible Viscous Flow Based on Adaptive Quadtree Mesh
Author : Xiaoyun HUANG, Xuelian JIANG and Yanbao LI
In simulating the incompressible viscous flow, computational accuracy and computational cost are both important problem researchers have to face. The present study introduces a new adaptive numerical model based on the quadtree mesh technique, which can effectively maintain computational accuracy as well as relieve computational cost. The new numerical model adopts the two-step projection method to solve the incompressible viscous N-S equation, in which an unconditionally stable MacCormack numerical scheme with second-order accuracy is adopted to treat the advection term, a new explicit scheme is introduced to discretize the viscous term in the frame of quadtree mesh and a modified central difference scheme is employed to discretize the Poisson equation. Finally, the model is validated by a driven cavity flow example in terms of flow velocity and by an example of flow over a circular cylinder in terms of drag coefficient and lift coefficient.
File Size : 859,033 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Article : THEME 6 - MARITIME HYDRAULICS AND COASTAL ENGINEERING
Date Published : 18/07/2016
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