@techreport{oai:jaxa.repo.nii.ac.jp:00043301,
 author = {藤谷, 克郎 and 姫野, 龍太郎 and Fujitani, Katsuro and Himeno, Ryutaro},
 month = {Dec},
 note = {Three-dimensional unsteady flow of the viscous incompressible fluid is calculated by using a finite-difference method and visualized by a graphic workstation. A grid system around an automobile has a multi-grid structure and is generated by a trans-finite-inter-polation method. The number of grid points is 112 by 73 by 56 and the Reynolds number based on the length of the automobile is 5,000,000. The calculation of a flow field is done on Fujitsu VP200 and its computational time is about 20 hours. Computed flow fields of 200 time steps are stored in magnetic tapes. Using them, streak-lines are calculated on a mini-supercomputer C-1 and even then visualized on a graphic workstation IRIS 4D. A motion film is taken the screen of IRIS 4D frame by flame using a computer-controlled VTR system. A longitudinal vortex on the side-window is almost steady. However, the other vortices, such as a horse-shoe vortex in front of the front windshield and vortices on the rear-window, show periodical changes and are shed one by one. It is found that a motion film makes the unsteady three-dimensional flow understandable and inevitable. Also, the amount of the data of the three-dimensional unsteady calculation is so huge that adequate shortening of data is necessary., 資料番号: NALSP0009010, レポート番号: NAL SP-9},
 title = {計算による3次元非定常流れの可視化},
 year = {1988}
}