RT Journal Article
T1 Numerical simulations of thixotropic semi-solid aluminium alloys in open-rotor and rotor–stator mixers
A1 Garcia-Beristain, Imanol
A1 Figueroa-Landeta, Michelle
A1 López-Aguilar, J. Esteban
A1 de Cortazar, Maider Garcia
A1 Girot, Franck
A1 Ellero, Marco
AB This research uses the Bautista–Manero–Puig (BMP) model to examine flow patterns of semi-solid aluminium alloys (Al) in open-rotor and stator–rotor mixers via numerical solutions. The model captures the distinct thixo-viscoelastic behaviour of the Al-alloys at low temperatures, near melting point. The analysis involves using 2D structured-meshes for open-rotor and rotor–stator geometries. Solutions for Newtonian and thixo-viscoelastic model fluids are reported through fields of velocity, strain-rate, stress, fluidity, and streamlines, revealing distinct features. Findings reveal nonlinear thixo-viscoelastic vortex patterns that vary with rotational speed, resulting in different fluidity and stress profiles compared to the invariant response of Newtonian fluids. At lower rotational speeds, rotor-pallets are dominated by structured material that gradually becomes unstructured to cover the outer vessel walls. When including a stator, the inner stator region resembles the Newtonian solution, but the outflow through stator gaps is reduced due to flow-structure levels outside. This information is of interest for industrial design and optimization of molten Al-alloy processing.
SN 0377-0257
YR 2023
FD 2023-11
LK https://hdl.handle.net/11556/3654
UL https://hdl.handle.net/11556/3654
LA eng
NO Garcia-Beristain , I , Figueroa-Landeta , M , López-Aguilar , J E , de Cortazar , M G , Girot , F & Ellero , M 2023 , ' Numerical simulations of thixotropic semi-solid aluminium alloys in open-rotor and rotor–stator mixers ' , Journal of Non-Newtonian Fluid Mechanics , vol. 321 , 105128 . https://doi.org/10.1016/j.jnnfm.2023.105128
NO Publisher Copyright: © 2023
NO This work has been partially funded by the Basque Government, Spain through the projects Elkartek CIRCU-AL: KK-2020/00016 and SosIAMet KK-2022/00110. Financial support through the BERC 2022–2025 program and by the Spanish State Research Agency through BCAM Severo Ochoa Excellence Accreditation CEX2021-001142-S/MICIN/AEI/10.13039/501100011033 is also acknowledged. Funding was also provided by the Provincial Council of Bizkaia within the Technology Transfer Programme 2021 with FEDER co-funding. JELA acknowledges the support from Consejo Nacional de Ciencias, Humanidades y Tecnologías (CONAHCYT, Mexico - grant number CF-2023-I-318) and from Universidad Nacional Autónoma de México UNAM (grant numbers PAPIIT IA102022 and PAIP 5000-9172 Facultad de Química). This work has been partially funded by the Basque Government, Spain through the projects Elkartek CIRCU-AL : KK-2020/00016 and SosIAMet KK-2022/00110 . Financial support through the BERC 2022–2025 program and by the Spanish State Research Agency through BCAM Severo Ochoa Excellence Accreditation CEX2021-001142-S/MICIN/AEI/10.13039/501100011033 is also acknowledged. Funding was also provided by the Provincial Council of Bizkaia within the Technology Transfer Programme 2021 with FEDER co-funding. JELA acknowledges the support from Consejo Nacional de Ciencias, Humanidades Tecnologías (CONAHCYT, Mexico - grant number CF-2023-I-318 ) and from Universidad Nacional Autónoma de México UNAM (grant numbers PAPIIT IA102022 and PAIP 5000-9172 Facultad de Química).
DS TECNALIA Publications
RD 31 jul 2024