固-液分散系の法線応力について

概要

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Some flow behavior of the ZnO-water system was observed over wide shearing range using three sorts of viscometers, and the following results were obtained : (1) For the concentrated systems, so-called extended Ostwald flow patterns were obtained. (2) In dilatant and even in III-Newtonian ranges, the remarkable dependence of flow curves on capillary dimensions was found, suggesting the distinct contribution of normal stress effect. (3) The normal stress difference determined by both PGB and jet expansion methods was always larger than the shearing stress. (4) The calculated values for (SS_<11>SS_<22>)/S_w were 6.0〜11 for the 73.6 wt% suspension and 5.8〜8.6 for the 70.4 wt% suspension, respectively. (5) The observed values of (S_<11>S_<22>)_<PGB> were always larger than those of (S_<11>S_<22>)_<jet>.
社団法人日本材料学会の論文
1973-05-15