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毎日一問----------工程基礎知識 単択問題(9月25日)

2017-09-25View Original

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参加すれば3の報酬がもらえます。単一選択問題:層流と乱流の本質的な違いは( )です。 A 湍流流速>層流流速; B 流路の断面が大きい場合は乱流、断面が小さい場合は層流; C層流のレイノルズ数<乱流のレイノルズ数; 層流には半径方向の脈動がなく、乱流には半径方向の脈動がある。
Reply #22017-09-25
層流には半径方向の脈動がなく、乱流には半径方向の脈動がある。
Reply #32017-09-25
層流には半径方向の脈動がなく、乱流には半径方向の脈動がある。

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