Abstract
Boardman and Whitmore1 have described experiments in which the yield stress in a suspension is measured from the force exerted on a rectangular body which is immersed in the suspension and which has come to rest. They find that the force on the body due to the yield stress depends on the orientation of the body, which it should not, and that this dependence can be expressed by assuming a horizontal-face yield stress about five times the vertical-face yield stress.
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References
Boardman, G., and Whitmore, R. L., Nature, 187, 50 (1960).
Rae, D., Ph.D. thesis, University of Durham (1952).
Thornton, S., and Rae, D., Proc. Phys. Soc., B, 66, 120 (1953).
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RAE, D. Yield Stress exerted on a Body immersed in a Bingham Fluid. Nature 194, 272 (1962). https://doi.org/10.1038/194272a0
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DOI: https://doi.org/10.1038/194272a0
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