Rheologica Acta

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The rheological behavior of cement pastes is highly affected by temperature and water content, which hinders our capacity to build effectively in extreme conditions. We herein employ a recently proposed constitutive rheological model (Ioannou and Stephanou, J Rheol 67:849–861, 2023), to model the rheological behavior of cement pastes over an extensive temperature and water-to-cement ratio (w/c) r…

Accurately modeling the viscosity of shear-thinning elastomer compounds is crucial for optimizing their performance in industrial applications. Classical models (Power Law, Carreau, Cross) cannot directly account for temperature, and when coupled with temperature models (Arrhenius, WLF, VTF), they become mathematically complex and computationally costly for simulations. This study introduces the …

Abstract This study investigates the long-term sedimentation stability of high-viscosity linear polysiloxane-based magnetorheological fluids (HVLP MRFs) using an automated vertical-axis inductance monitoring system (AVAIMS). While the inverse relationship between carrier fluid viscosity and sedimentation rate is theoretically established through Stokes’ law, experimental validation over multi-yea…

Abstract Motivated by the treatment of varicose veins with aqueous foams, we determine the velocity profiles and yield surface positions for pressure-driven flows of a Bingham fluid in curved channels, incorporating Navier wall slip to capture the slip behavior of aqueous foams. Assuming a constant pressure gradient – consistent with syringe-driven injection in sclerotherapy – we reproduce a clos…

Strain hardening of polymer melts is a rheological feature that improves properties of items processed by operations with pronounced extensional deformations. Thus, developments have been undertaken over the years to modify linear polypropylenes not showing strain hardening. The different ways to generate strain hardening polypropylenes are reviewed, and it is shown how rheological relations can …

This study reexamines the constraint for volume conservation of the Rouse chain proposed recently (Kwon 2024). We provide conceivable reasoning for the constraint written in terms of the normal mode amplitude. Formulating the necessary number of constraints is verified to require vanishing correlation between distinct linear combinations of segmental vectors. Considering these observations, we pr…