Reliable validation based on optical flow visualization for CFD simulations |
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Authors: | Jiang Zonglin |
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Institution: | (1) Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | A reliable validation based on the optical flow visualization for numerical simulations of complex flowfields is addressed
in this paper. Several test cases, including two-dimensional, axisymmetric and three-dimensional flowfields, were presented
to demonstrate the effectiveness of the validation and gain credibility of numerical solutions of complex flowfields. In the
validation, images of these flowfields were constructed from numerical results based on the principle of the optical flow
visualization, and compared directly with experimental interferograms. Because both experimental and numerical results are
of identical physical representation, the agreement between them can be evaluated effectively by examining flow structures
as well as checking discrepancies in density. The study shows that the reliable validation can be achieved by using the direct
comparison between numerical and experiment results without any loss of accuracy in either of them. |
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Keywords: | CFD validation optical flow visualization numerical simulation numerical flow visualization |
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