球のまわりの流れの測定　　後流逆流領域長さ

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  • Measurements of the flow round a sphere (To the length of reversed flow in the wake)
  • キュウ ノ マワリ ノ ナガレ ノ ソクテイ コウリュウ ギャクリュウ リョウ

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The reversed flow region length of a sphere wake was measured by the smoke wire method between a subcritical Reynolds number and a supercritical Reynolds number ; 105 to 4×105. On the critical Reynolds number range, the sudden decreased in the reversed flow length of a sphere wake as wall as in the value of the drag coefficient of a sphere. The reversed flow length against Reynolds number draws a hysteresis line as the drag coefficient draws.

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