| 资料简介： |
a systematic study of squeeze flow (sf) is presented using different concentrations of carbopol with varying yield stresses. a constant volume of sample is placed between two parallel plates a series of 3 constant fce steps applied; each lasting 8 minutes, allowing the sample to achieve a limiting height befe the next fce is applied. the yield stress of each fluid can be calculated from the limiting height as predicted by sf they. in this study, the reliability of sf f the determination of the yield stress is analyzed through comparison with precise rheometrical tests. the rheometrical data is combined with sf they to obtain the predicted dynamic height evolution. the predicted height evolution represents the results of the sf experiments quite nicely. ultimately, the yield stress values determined from the sf experiments those of the precise rheometrical tests are in good agreement. |