A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

doi:10.1088/1674-1056/24/8/084701

Abstract The influence of experimental error on lift force evaluated by Noca's flux equation is studied based on adding errors into the direct numerical simulation data for flow past cylinder at Re=100. As Noca suggested using the low-pass filter to get rid of the high-frequency noise in the evaluated lift force, we verify that his method is inapplicable for dealing with the dataset of 1% experimental error, although the precision is acceptable in practice. To overcome this defect, a novel method is proposed in this paper. The average of the lift forces calculated by using multiple control volume is taken as the evaluation before applying the low-pass filter. The method is applied to an experimental data for flow past a cylinder at approximately Re=900 to verify its validation. The results show that it improves much better on evaluating the lift forces.

Keywords: flux equation lift force experimental error

Received: 10 November 2014
Revised: 30 January 2015
Accepted manuscript online:

PACS:

47.32.C-

(Vortex dynamics)

Corresponding Authors: Sui Xiang-Kun
E-mail: xksui@lnm.imech.ac.cn

Cite this article:

Sui Xiang-Kun (隋相坤), Jiang Nan (姜楠) A novel method of evaluating the lift force on the bluff body based on Noca's flux equation 2015 Chin. Phys. B 24 084701

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A novel method of evaluating the lift force on the bluff body based on Noca's flux equation

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