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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 fluid flow via the TOBS method and a geometry trimming procedure

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Author(s):
Picelli, Renato [1] ; Moscatelli, Eduardo [2] ; Yamabe, Paulo Vinicius Miyuki [2] ; Alonso, Diego Hayashi [2] ; Ranjbarzadeh, Shahin [2] ; dos Santos Gioria, Rafael [1] ; Meneghini, Julio Romano [3] ; Silva, Emilio Carlos Nelli [2]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Dept Min & Petr Engn, Polytechn Sch, Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Dept Mechatron & Mech Syst Engn, Polytech Sch, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Dept Mech Engn, Polytech Sch, Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION; v. 65, n. 1 JAN 2022.
Web of Science Citations: 0
Abstract

One of the current challenges for topology optimization methods is the consideration of high Reynolds fluid flow analysis, especially including turbulence models. The issues in current pseudo-density-based methods are threefold. The fluid boundaries are unknown during optimization, the convergence to [0, 1] designs might be highly dependent on the tuning of the optimization parameters and it is difficult to specify the maximum value of the inverse permeability to avoid the presence of fluid flowing inside the modeled solid medium. This paper proposes a methodology to tackle these three problems. The Topology Optimization of Binary Structures (TOBS) method and a geometry trimming procedure are employed to create the TOBS-GT method. This method uses a binary [0, 1] design variable, which naturally creates explicit fluid boundaries during optimization and avoids the need for tuning the material model interpolation parameters. The geometry trimming procedure removes the solid regions and create a CAD model with only the fluid analysis domain and smooth walls. Since there is no solid region inside the analysis mesh, the problem of having fluid flowing through a solid region is avoided. The k-epsilon and k-omega turbulence models are chosen to illustrate that the method may be applied to any turbulence model. The equilibrium equations are solved using the finite element method. The total fluid energy dissipation is minimized considering a fluid volume constraint. Numerical results show that the TOBS-GT method is well-fitted for topology optimization of turbulent fluid flow problems. (AU)

FAPESP's process: 13/24434-0 - Electromagnetic propeller systems for implantable artificial heart and mechanical circulatory support devices
Grantee:José Roberto Cardoso
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/27049-0 - Topology optimization method applied to the design of rotor and volute of ventricular assist devices based on the viscosity effect (Tesla principle)
Grantee:Diego Hayashi Alonso
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 19/01685-3 - Addressing Design Challenges of Offshore Structures via Multiphysics Topology Optimization
Grantee:Renato Picelli Sanches
Support Opportunities: Scholarships in Brazil - Young Researchers
FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 18/05797-8 - Addressing design challenges of offshore structures via Multiphysics topology optimization
Grantee:Renato Picelli Sanches
Support Opportunities: Research Grants - Young Investigators Grants