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- YIN Yuwei
- Tokyo Institute of Technology
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- AOKI Takayuki
- Tokyo Institute of Technology
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- WATANABE Seiya
- Kyushu University
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- NIWA Masayoshi
- Free Sports Writer
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- KOBAYASHI Hiromichi
- Keio University
Bibliographic Information
- Other Title
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- ジャイロ回転する野球ボールのスパコンによる空力解析
Description
<p>The aerodynamics of baseballs with gyro spins and their influences on the flight trajectories are studied. We use a simulation code based on Lattice Boltzmann Method with the cumulant collision term which works for a LES model. We analyze 2- and 4-seam orientations for gyro-spin balls according to the actual MLB pitches. Both results exhibit periodicity of lift forces. We also compute 2- and 4-seam orientations for back-spin according to compare them with the gyro-spin balls. In the case of back-spin balls, both exhibit longitudinal lift forces because of the magnus effect. In the case of gyro-spin, the time-averaged lift forces are almost zero. The trajectory of above 4 kinds of rotation is studied and the longitudinal displacement of the gyro-spin ball is largest among them. It is understood that aerodynamics of back-spin and gyro-spin balls are quite different, and the seam orientations have strong effects on the aerodynamic and flight trajectories.</p>
Journal
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- The Proceedings of the Symposium on sports and human dynamics
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The Proceedings of the Symposium on sports and human dynamics 2022 (0), A-6-2-, 2022
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390859160311595904
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- ISSN
- 24329509
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed