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- W2040731053 abstract "Time-averaged power dissipation rates have been measured in water in a 19.4 cm diameter reciprocating plate column operating at frequencies 0.6 to 3 Hz and amplitudes 5 to 20 mm. Measurements were also taken in water in a 15 cm diameter column operated at 1 to 5.7 Hz with amplitudes 1 to 10 mm. Several different types of doughnut reciprocating plates, fitting close to the column wall, were investigated. Power consumption at high amplitudes agreed with the predicted values using the quasi-steady flow model, while at low amplitudes the data were more in agreement with a recently proposed acoustic model. The measured power dissipations were slightly affected by the spacing between adjacent plates, and by the alignment of the holes in the case of plates with 3 holes. Flow patterns around the reciprocating plates were also observed with the aid of a thin beam of light reflecting from small particles suspended in the liquid. Well-developed circulation patterns were observed, depending strongly on the axial spacing between the plates.Les taux de dissipation d'energie moyennes dans le temps ont ete mesures dans l'eau dans une colonne a plateau reciproques de 19,4 cm de diametre fonctionnant a une frequence de 0,6 et 3 Hz et une amplitude de 5 a 20 mm. Des mesures ont egalement ete prises dans l'eau dans une colonne de 15 cm de diametre entre 1 et 5,7 Hz et 1 et 10 mm. On a etudie differents types de plateaux reciproques toriques, a faible degagement a la paroi de la colonne. La consommation d'energie aux amplitudes elevees montre un bon accord avec les valeurs predites au moyen du modele d'ecoulement en regime quasi permanent, tandis qu'a de faibles amplitudes les donnees sont davantage en accord avec un modele acoustique propose recemment. Les dissipations d'energie mesurees ont ete legerement modifiees par l'espacement entre les plateaux adjacents ainsi que par l'alignement des trous dans le cas des plateaux a trois trous. Les profils d'ecoulement autour des plateaux reciproques ont egalement ete observes a l'aide d'un mince faisceau de lumiere se reflechissant sur des petites particules suspendues dans le liquide. Enfin, on a observe des profils de circulation bien developpes, qui dependent fortement de l'espacement axial entre les plateaux." @default.
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- W2040731053 date "1995-08-01" @default.
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- W2040731053 title "Power dissipation and flow patterns in reciprocating baffle-plate columns" @default.
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- W2040731053 doi "https://doi.org/10.1002/cjce.5450730401" @default.
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