Laminar and drag‐reduced polymeric foam flow
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The volume-equalized power law model has been introduced as a constitutive equation for polymer foams. Large-scale horizontal flowing experiments, performed in pipe sections with different diameters at varying temperatures, demonstrate the applicability of the model. The model parameters, estimated by a simple linear regression procedure, were also used for the description of flow regimes which obey the phenomenon of drag reduction. In contrast to already existing turbulent foam flow correlations the foam behavior is described by a traditional friction factor versus a specific definition of Reynolds number plot. The proposed model fits the laminar and drag-reduced flow regime data. The nonlaminar results are compared to an already available correlation. © 1994, The Society of Rheology. All rights reserved.
author list (cited authors)
Winkler, W., Valkó, P., & Economides, M. J.