NEW TECHNIC OF WATER CIRCULATION BY UPWELLING GENERATED BY COANDA EFFECT

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  • コアンダ効果を利用した新たな湧昇流発生手法の上下層混合に対する有効性に関する検討
  • コアンダ コウカ オ リヨウ シタ アラタ ナ ヨウショウリュウ ハッセイ シュホウ ノ ジョウゲソウ コンゴウ ニ タイスル ユウコウセイ ニ カンスル ケントウ

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New method of generating the upwelling current which advances aeration of density stratification of ponds was discussed based on the numerical simulation and water tank experiments of buoyant and non-buoyant condition. Accuracy of the numerical simulation was verified by previous study on non-buoyant jet and it showed good agreement. Unsteady experiments of slanting-discharged buoyant wall jet indicated that the discharged jet formed the vertical rise upwelling current with low pressure and mixed upper and lower layer. In addition, the non-dimensional gross entrainment volume of the vertical rise upwelling current is estimated by 0.5 which is almost equal to the entrainment volume of wall jet. The presented method generates steady upwelling current which has the entrainment volume of wall jet.

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