@inproceedings{oai:jaxa.repo.nii.ac.jp:00003496,
 author = {三神, 史彦 and 八木, 良明 and Mikami, Fumihiko and Yagi, Yoshiaki},
 book = {宇宙航空研究開発機構特別資料: 第48回流体力学講演会/第34回航空宇宙数値シミュレーション技術シンポジウム論文集, JAXA Special Publication: Proceedings of the 48th Fluid Dynamics Conference / the 34th Aerospace Numerical Simulation Symposium},
 month = {Dec},
 note = {第48回流体力学講演会/第34回航空宇宙数値シミュレーション技術シンポジウム (2016年7月6日-8日. 金沢歌劇座), 金沢市, 石川, 48th Fluid Dynamics Conference /the 34th Aerospace Numerical Simulation Symposium (July 6-8, 2016. The Kanazawa Theatre), Kanazawa, Ishikawa, Japan, Mach cones created by a falling sphere are observed experimentally in a viscoelastic fluid. The fluid used is a dilute wormlike micelle solution of cetyletrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) dissolved in water. The shear wave speed for the CTAB/NaSal solution is c approximately equal to 10 mm/s. A sphere falls through the fluid faster than the speed of shear waves. Mach cones are clearly observed in vorticity fields. They have a multiple-cone structure. The first cone is involved with forward shearing motion in the direction induced by the falling sphere, and it is followed by weaker cones with backward shearing motion accompanied by a relaxation of the initial shearing motion. The results suggest the importance of considering shear-wave-based Mach numbers that facilitates the understanding of a complex phenomenon associated with viscoelastic fluid flows., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1630031021, レポート番号: JAXA-SP-16-007},
 pages = {161--166},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {粘弾性流体中でのマッハコーンの形成},
 volume = {JAXA-SP-16-007},
 year = {2016}
}