ダクト内パルプ液のパルプ繊維濃度の測定と流れ特性(流体工学,流体機械)

概要

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An optical measuring method to evaluate the fiber concentration has been developed for flowing pulp-suspensions. This method was applied to a fully-developed steady flow in ducts with a square cross section. The obtained results clarify quantitatively, in a definite form, the distributions of the fiber concentration that has long been an interesting subject of discussion among researchers. And also that shows availability of the method. Furthermore, it is found that the flow mechanism of pulp-suspension in ducts can be classified into five patterns. The degree of uniformity of the fiber concentration, that is suggested as the standard deviation of its distribution, is decreased from 0.3 to 0.05 with an increase of velocity for the test pulp suspensions of C_s=0.4〜0.8%.
2010-01-25