Abstract
The proposal ofJackson andKaye (1966) for evaluating both differences of normal stress in a viscometric flow by using only total thrust measurements in a cone- and-plate viscometer is extended. An analytic relation valid for all values of the separation between cone and plate is obtained, which is shown to include as special cases the well-known cone- and-plate formula, the parallel-plate formula ofKotaka et al. (1959) andJackson andKaye's.
Examples of the method's application to experimental results are given.
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On leave from: Department of Chemical Engineering, Pembroke Street, Cambridge.
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Marsh, B.D., Pearson, J.R.A. The measurement of normal-stress differences using a cone- and-plate total thrust apparatus. Rheol Acta 7, 326–331 (1968). https://doi.org/10.1007/BF01984846
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DOI: https://doi.org/10.1007/BF01984846