文献类型：期刊文献

英文题名：Static measurement of yield stress using a cylindrical penetrometer

作者：Uhlherr, PHT; Guo, J; Fang, TN; Tiu, C

机构：[1]Monash Univ, Dept Chem Engn, Clayton, Vic 3168, Australia;[2]E China Univ Sci & Technol, Dept Chem Engn, Shanghai 200237, Peoples R China

年份：2002

卷号：14

期号：1

起止页码：17

外文期刊名：KOREA-AUSTRALIA RHEOLOGY JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000179285800003)】；

语种：英文

外文关键词：yield stress; non-Newtorian fluid; penetrometer

摘要：A novel and simple method using a cylindrical penetrometer is being developed for the measurement of yield stress. The principle of this technique is based on the measurement of the static equilibrium of a falling penetrometer in a yield stress fluid. The yield stress is simply determined by a balance of forces acting on the penetrometer. The yield stress of Carbopol gels and TiO2 suspensions has been measured using this method. The results are in reasonable agreement with the values from conventional methods. The effects of the dimensions and weight of the penetrometer have been examined. The long-term behaviour was also observed. No measurable creep was seen and equilibrium was found to be very quickly established. The cylindrical penetrometer technique promises to be a simple, quick and reliable static method for the measurement of yield stress.