Development and Assessment of an Isotropic Four-Equation Model for Heat Transfer of Low Prandtl Number Fluids
文献类型：期刊论文
| 作者 | Su, Xingkang1,2; Li, Xianwen1,2; Wang, Xiangyang3; Liu, Yang3 ; Chen, Qijian3; Shi, Qianwan3; Sheng, Xin1,2; Gu, Long1,2,3
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| 刊名 | FRONTIERS IN ENERGY RESEARCH
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| 出版日期 | 2022-02-08 |
| 卷号 | 10页码:15 |
| 关键词 | low Pr fluid four-equation OpenFOAM heat transfer liquid metal |
| ISSN号 | 2296-598X |
| DOI | 10.3389/fenrg.2022.816560 |
| 通讯作者 | Gu, Long(gulong@impcas.ac.cn) |
| 英文摘要 | In the simple gradient diffusion hypothesis, the turbulent Prandtl number ( P r t ) with a constant of 0.85 is difficult to accurately predict for liquid metals having low Prandtl numbers ( P r ), while a four-equation model can improve this solution by introducing the turbulence time-scale into the calculation of turbulent thermal diffusivity. However, the four-equation model's transport form and numerical stability are so complex that suitable commercial code is lacking. Therefore, an isotropic four-equation model with simple Dirichlet wall boundary conditions is built in the present work. Based on the open-source computational fluid dynamics program OpenFOAM, the fully developed velocity, temperature, Reynolds stress, and heat flux of low P r fluids ( P r = 0.01-0.05) in the parallel plane are obtained by numerical simulation. The results show that the time-average statistics predicted using the present four-equation model are in good agreement with the direct numerical simulation data. Then, the isotropic four-equation model is used to analyze the flow and heat of liquid metal ( P r = 0.01) in a quadrilateral infinite rod bundle. The numerical results are compared with the various and available experimental relationships. The Nusselt numbers calculated using the isotropic four-equation model are betweenness the available correlations, while the turbulent Prandtl number model using a constant of 0.85 over predicts heat transfer. More detailed local heat transfer phenomena and distribution of low Pr fluids are obtained using the present isotropic four-equation model. |
| WOS关键词 | TRANSFER TURBULENCE MODEL ; CHANNEL FLOW ; 2ND-MOMENT CLOSURE ; SIMULATIONS ; CONVECTION ; DNS ; TRANSPORT |
| 资助项目 | [2020YFB1902104] ; [Y828020XZ0] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000761015500001 |
| 出版者 | FRONTIERS MEDIA SA |
| 源URL | [http://119.78.100.186/handle/113462/142041]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Gu, Long |
| 作者单位 | 1.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China 2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing, Peoples R China 3.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Xingkang,Li, Xianwen,Wang, Xiangyang,et al. Development and Assessment of an Isotropic Four-Equation Model for Heat Transfer of Low Prandtl Number Fluids[J]. FRONTIERS IN ENERGY RESEARCH,2022,10:15. |
| APA | Su, Xingkang.,Li, Xianwen.,Wang, Xiangyang.,Liu, Yang.,Chen, Qijian.,...&Gu, Long.(2022).Development and Assessment of an Isotropic Four-Equation Model for Heat Transfer of Low Prandtl Number Fluids.FRONTIERS IN ENERGY RESEARCH,10,15. |
| MLA | Su, Xingkang,et al."Development and Assessment of an Isotropic Four-Equation Model for Heat Transfer of Low Prandtl Number Fluids".FRONTIERS IN ENERGY RESEARCH 10(2022):15. |
入库方式： OAI收割
来源：近代物理研究所
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