Preprocessed Visualization of Large Scale Unsteady Flow Simulations

Article type: Research Article

Authors: Teramoto, S. | Fujii, K.

Affiliations: Department of Aeronautics and Astronautics, School of Engineering, the University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan. | The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan.

Abstract: In some cases, conventional CFD visualization techniques do not give us sufficient information of the flowfield, especially when the flowfield is unsteady, and there is a need for a new post-processing technique. In the present paper, one of such new post-processing techniques is proposed. In the present technique, raw result of CFD simulation is pre-processed by frequency filters, and then processed secondary data set is visualized. The idea is applied to two examples. The examples show that the present method visualizes each frequency mode separately, and gives clear view of the temporal variation of the whole flowfield. The results indicate that the present method improves the understandings of the flow mechanism.

Keywords: unsteady flowfields, postprocessing, CFD, large-scale flow structure, shear layer

Journal: Journal of Visualization, vol. 3, no. 4, pp. 313-321, 2001