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Accession number;03A0178545
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| Title;Capillary Diameter Effects on the Viscosity of Coagulated Montmorillonite Suspension. |
| Author;
MIYAHARA KAZUMI
(National Inst. Rural Engineering)
OI SETSUO
(National Inst. Rural Engineering)
NAKAISHI KATSUYA
(Ibaraki Univ., School of Agricuture, JPN)
ADACHI YASUHISA
(Univ. of Tsukuba, Inst. of Agric. and For. Eng.)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.223;PAGE.63-69(2003)
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| Figure&Table&Reference;FIG.7, TBL.1, REF.17 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The viscosity equation of coagulated suspension flowing through capillary tube was theoretically derived taking into account effects of the breakup of flocs due to shear stress and the slipping phenomenon along the wall of tube. The validity of the derived equation was tested by the measurement of the apparent viscosity of the coagulated montmorillonite suspension as a function of electrolyte concentration and capillary diameter. In the region of low electrolyte concentration(0.3, 0.45mol/L NaCl), the viscosity decreased with increasing the capillary diameter, while in the region of high electrolyte concentration(0.8, 1.0mol/L NaCl), the viscosity decreased with decreasing the diameter. These results were fully predictable by the derived equation. That is, the former is due to the breakup of flocs and the latter is due to the slipping of flocs along the capillary wall. It was found that the thickness of the slip layer was 0.4 times floc diameter and the floc strength increased with increasing electrolyte concentration. (author abst.) |
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