A new method to determine the yield stress of a fluid from velocity profiles in a capillary
J.J. López-Durán, J. Pérez-González, B.M. Marín-Santibáñez and F. Rodríguez-González
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The flow kinematics of a viscoplastic fluid in a capillary rheometer is described for the first time by using particle image velocimetry.
Evidence of true plug flow in a fluid is presented.
A reliable method to obtain the yield stress by using only the derivative of the velocity profiles and the capillary wall shear stress is presented.
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