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Sen i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)
The flow visualization experiments of shear-thinning aqueous polyacrylamide solutions through a rectangular channel with an abrupt contraction were carried out, using not only the tracer method but also dye solution injection technique in order to study the transition from a steady flow regime to an unstable flow regime and the structure of the unstable flows. It is found that two basic transition patterns can be identified accoding to the flow properties of polymer solutions and channeldoi:10.4188/transjtmsj.45.9_t137 fatcat:eijwgb23wzfcndmolcekupuwm4