The measurement of normal-stress differences using a cone- and-plate total thrust apparatus |
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| Authors: | B D Marsh Dr J R A Pearson |
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| Institution: | (1) Department of Chemical Engineering, The University of Wisconsin, Madison, USA;(2) Present address: Union Carbide Corporation, Bound Brook, New Jersey;(3) Present address: Chemical Engineering Department, Pembroke St., Cambridge, England |
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| 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.On leave from: Department of Chemical Engineering, Pembroke Street, Cambridge. |
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