Simulations of Johnson-Segalman viscoelastic fluids flows in shear-thinning regime

0565899 - MÚ 2023 RIV GB eng C - Conference Paper (international conference)
Bodnár, Tomáš - Sequeira, A.
Simulations of Johnson-Segalman viscoelastic fluids flows in shear-thinning regime.
Journal of Physics: Conference series. Vol. 2367. Bristol: IOP, 2022 - (Kucaba-Piętal, A.; Kordos, A.; Rejwer-Kosińska, E.), č. článku 012028. ISSN 1742-6588.
[25th Fluid Mechanics Conference, FMC 2022. Rzeszów (PL), 07.09.2022-09.09.2022]
Grant - others:AV ČR(CZ) AP2101
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:67985840
Keywords : non-Newtonian flow * shear flow * viscoelasticity
OECD category: Pure mathematics
https://doi.org/10.1088/1742-6596/2367/1/012028

This paper presents selected numerical simulations performed using Johnson-Segalman model with specific setting of the convected derivative resulting in shear-thinning behavior of the model. The results are compared with the generalized Oldroyd-B model, which is typically used to simulate shear-thinning viscoelastic flows. Both models are solved using an in-house finite-volume solver on structured grid simulating steady flow in three-dimensional axisymmetric channel with smooth contraction. The results presented here focus on the flow recirculation behind the contraction and the structure of the forces emanating from the viscoelastic stress tensor.
Permanent Link: https://hdl.handle.net/11104/0337374