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Summary & Details

Soccer Ball and Flow

サッカーボールと流れ

Delivery: Available on this site

Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20234235

Paper/Info type: Journal of Society of Automotive Engineers of Japan

Vol.77 No.5

Pages: 94-99(Total 6 p)

Date of publication: May 2023

Publisher: JSAE

Language: Japanese

Detailed Information

Category(J)	ホットトピックス Translation
Category(E)	Hot Topics
Author(J)	1) 浅井武
Author(E)	1) Takeshi Asai
Affiliation(J)	1) 環太平洋大学
Abstract(J)	カタールワールドカップ2022公式球のAl Rihlaの臨界レイノルズ数は、約2.2×100000 (~14m/s)であり、南アフリカワールドカップ2010のJabulaniのそれは約4.2×100000 (~27 m/s)であった。Al Rihlaの臨界レイノルズ数は、Jabulaniのそれより小さな値を示した。 Translation
Abstract(E)	The critical Reynolds numbers were ～ 2.2 × 100,000（～ 14 m/s）for Al Rihla（20 panels）which was the official ball of the 2020 FIFA Qatar World Cup and ～ 4.2 × 100,000（～ 27 m/s）for Jabulani（8 panels）which was the official ball of the 2010 South Africa World Cup. The critical Reynolds numbers of Al Rihla was smaller than that of Jabulani.

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