A tri-tree grid generation procedure is developed together with a finite volume method on the unstructured grid for solving the Navier-Stokes equations. A hierarchic numbering system for the data structure is used. The grid is adapted by adding and removing cell elements dependent on the vorticity magnitude. A special treatment is developed to ensure good quality triangular elements around the cylinder boundary. The adopted finite volume method is based on the cell-centred scheme. The pressure-velocity coupling is treated using the SIMPLE algorithm. A modified QUICK scheme for unstructured grids is derived. The developed method is used to simulate the flow past single and multiple cylinders at low Reynolds number. The obtained results are in good agreement with published data.
|Number of pages||38|
|Journal||International Journal for Numerical Methods in Fluids|
|Publication status||Published - Jun 2002|
Hu, Z. Z., Greaves, D. M., & Wu, G. X. (2002). Numerical simulation of fluid flows using an unstructured finite volume method with adaptive tri-tree grids. International Journal for Numerical Methods in Fluids, 39(5), 403-440. https://doi.org/10.1002/fld.325