A microstructure model for viscoelastic–thixotropic fluids

A microstructure model to describe the viscoelasticity and thixotropy properties of complex fluids is proposed. The model is based on the Lodge–Yamamoto network theory and is an extension of the Phan-Thien–Tanner model, with a kinetic process in which specific forms of creation and destruction rates...

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Veröffentlicht in:Physics of fluids (1994) 2020-12, Vol.32 (12)
Hauptverfasser: Le-Cao, K., Phan-Thien, N., Mai-Duy, N., Ooi, S. K., Lee, A. C., Khoo, B. C.
Format: Artikel
Sprache:eng
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Zusammenfassung:A microstructure model to describe the viscoelasticity and thixotropy properties of complex fluids is proposed. The model is based on the Lodge–Yamamoto network theory and is an extension of the Phan-Thien–Tanner model, with a kinetic process in which specific forms of creation and destruction rates are assumed. The final equation is simple with a small number of empirical parameters required and can be conveniently employed in engineering simulations. The predictions based on the model in a variety of shear and oscillatory shear flows are given. The stress response obtained from the model prediction agrees well with experiments on both shear and oscillatory flow histories.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0033199