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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Topology optimization of turbulent rotating flows using Spalart-Allmaras model

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Sa, Luis F. N. [1] ; Yamabe, Paulo V. M. [1] ; Souza, Bruno C. [1] ; Silva, Emilio C. N. [1]
Total Authors: 4
[1] Univ Sao Paulo, Dept Mechatron & Mech Syst Engn, Escola Politecn, Av Prof Mello Moraes 2231, BR-05508030 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Web of Science Citations: 0

The design of rotating fluid devices, such as flow machines, mixers, and separators, with a focus on performance improvement is of high interest. They usually operate under high Reynolds numbers featuring turbulent flows. In this research, the topology optimization model of turbulent flows is expanded by adapting the Spalart-Allmaras (SA) model with the Rotation/Curvature Correction to consider a density-based material model. This correction improves the turbulence evaluation when rotating frames are considered. The SA model considers the distance to the nearest wall to calculate the turbulent viscosity. However, in the TO, it uses the distance to the nearest solid element, which is calculated by using a novel Eikonal equation with a penalization model. The algorithm is implemented by using a finite element model to solve the state equations. The pyadjoint libraries are used to perform the automatic sensitivity derivation. The objective function considered minimizes energy dissipation. The algorithm is evaluated by performing the optimization of rotating flows with high Reynolds numbers. Several optimized topologies for different domains and angular velocities are shown. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/19261-7 - Topology Optimization Method Applied to Ventricular Assist Device Rotor and Volute design
Grantee:Luís Fernando Nogueira de Sá
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/24434-0 - Electromagnetic propeller systems for implantable artificial heart and mechanical circulatory support devices
Grantee:José Roberto Cardoso
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support type: Research Grants - Research Centers in Engineering Program