A volume-based discrete test filter for conducting large eddy simulations with application to physiological flow in a constricted tube

作者：Bahramian F; Straatman A G^*

来源：International Journal for Numerical Methods in Fluids, 2010, 64(2): 209-236.

DOI：10.1002/fld.2158

• large eddy simulation
• test filter
• volume-average

A discrete test-filtering operation that takes advantage of a volume-averaging procedure, as opposed to the more popular line-interpolation technique, has been developed to enable mixed-scale and dynamic LES simulations on general unstructured grids. Simulations of fully developed turbulent flow in a square duct show that the proposed test filter gives the results of similar accuracy to the best modern filters developed for non-uniform orthogonal grids, but a second-order correction is required to produce solutions of sufficient accuracy. The discrete filter technique is also used to simulate stationary and pulsatile turbulent flow in a 75% constricted tube, in which the flow undergoes transition to turbulence. Comparisons to previous published results confirm that the results obtained using the proposed discrete test filter are in a good agreement with the existing experimental and numerical results.

• 出版日期2010-9-20