Influence of heat transfer conditions on the flow regimes of ananomalously thermoviscous liquid

Traditional models of viscous liquid flow assume constant viscosity, independent of pressure, temperature, and deformation rate.However, experiments show that incorporating variable viscosity and non-Newtonian properties better captures dynamic flow regimes and physical effects, such as oscillations in flow rate or shear stress.Temperature-dependent viscosity plays a crucial role in non-isothermal flows, influencing parameter distribution, critical Reynolds number, and flow rate.Many industrial liquids exhibit complex, non-monotonic viscosity-temperature behavior, forming high-viscosity zones ("viscous barriers") during flow with wall heat exchange.This study presents numerical results on how heat exchange conditions affect flow regimes and induce self-oscillations in an annular channel with anomalously thermoviscous liquid.