Squeezing a viscoelastic fluid from a cone |
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Authors: | N Phan-Thien |
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Institution: | (1) Mechanical Engineering Department, Sydney University, 2006 Sydney, N.S.W., Australia |
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Abstract: | The paper reports an exact kinematics for the squeezing flow from a cone of a general viscoelastic fluid. To obtain numerical values for the stresses, a network model that allows stress overshoot and shear-thinning in the start-up of a shear flow is adopted. Both these features are important in this flow. For the special case of an Oldroyd-B fluid it is shown that there is a limiting Weissenberg number above which at least one component of the stresses increases unboundedly with time. |
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Keywords: | Squeezing flow cone limiting Weissenberg number Oldroyd-B fluid |
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