Topology Optimization of Turbulent Flow Cooling Structures Based on the k-ε Model
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| Název: | Topology Optimization of Turbulent Flow Cooling Structures Based on the k-ε Model |
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| Autoři: | Yiwei Sun, Menglong Hao, Zexu Wang |
| Zdroj: | Entropy, Vol 25, Iss 1299, p 1299 (2023) |
| Informace o vydavateli: | MDPI AG |
| Rok vydání: | 2023 |
| Sbírka: | Directory of Open Access Journals: DOAJ Articles |
| Témata: | k-ε turbulent model, fluid topology optimization, fluid–solid conjugate heat transfer, variable density method, cooling channel design, Science, Astrophysics, QB460-466, Physics, QC1-999 |
| Popis: | Topology optimization (TO) is an effective approach to designing novel and efficient heat transfer devices. However, the TO of conjugate heat transfer has been essentially limited to laminar flow conditions only. The present study proposes a framework for TO involving turbulent conjugate heat transfer based on the variable density method. Different from the commonly used and oversimplified Darcy model, this approach is based on the more accurate and widely accepted k-ε model to optimize turbulent flow channels. We add penalty terms to the Navier–Stokes equation, turbulent kinetic energy equation, and turbulent energy dissipation equation, and use interpolation models for the thermal properties of materials. A multi-objective optimization function, aiming to minimize the pressure drop and the average temperature, is set up to balance the thermal and hydraulic performance. A case study is conducted to compare various optimization methods in the turbulent regime, and the results show that the present method has substantially higher optimization effectiveness while remaining computationally inexpensive. |
| Druh dokumentu: | article in journal/newspaper |
| Jazyk: | English |
| Relation: | https://www.mdpi.com/1099-4300/25/9/1299; https://doaj.org/toc/1099-4300; https://doaj.org/article/454f73e3046845998bf2a8de0f399b27 |
| DOI: | 10.3390/e25091299 |
| Dostupnost: | https://doi.org/10.3390/e25091299 https://doaj.org/article/454f73e3046845998bf2a8de0f399b27 |
| Přístupové číslo: | edsbas.67F9C44B |
| Databáze: | BASE |
Nájsť tento článok vo Web of Science | Abstrakt: | Topology optimization (TO) is an effective approach to designing novel and efficient heat transfer devices. However, the TO of conjugate heat transfer has been essentially limited to laminar flow conditions only. The present study proposes a framework for TO involving turbulent conjugate heat transfer based on the variable density method. Different from the commonly used and oversimplified Darcy model, this approach is based on the more accurate and widely accepted k-ε model to optimize turbulent flow channels. We add penalty terms to the Navier–Stokes equation, turbulent kinetic energy equation, and turbulent energy dissipation equation, and use interpolation models for the thermal properties of materials. A multi-objective optimization function, aiming to minimize the pressure drop and the average temperature, is set up to balance the thermal and hydraulic performance. A case study is conducted to compare various optimization methods in the turbulent regime, and the results show that the present method has substantially higher optimization effectiveness while remaining computationally inexpensive. |
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| DOI: | 10.3390/e25091299 |