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RANS Model development on temperature variance in conjugate heat transfer
Journal of Turbulence ( IF 1.9 ) Pub Date : 2020-12-22 , DOI: 10.1080/14685248.2020.1860214
Gaoqiang Yang 1, 2 , Hector Iacovides 1 , Timothy Craft 1 , David Apsley 1
Affiliation  

In this study, a RANS model of turbulent conjugate heat transfer has been developed, which is applicable across a range of different combination of fluid and solid thermal properties. This is achieved by focusing on the transport equations for the temperature variance and its dissipation rate across the solid walls which bound the flow region. In this investigation we make use of a wider range of DNS data reported by other researchers, to advance our understanding of the processes involved and to revise and extend the capabilities of the model of Craft et al [12 Craft TJ, Iacovides H, Uapipatanakul S. Towards the development of RANS models for conjugate heat transfer. J Turbulence. 2010;11(26):116. [Google Scholar]] including a more physical fluid-solid interface condition on the dissipation of thermal fluctuations and a dependence of model coefficients on Prandtl number. The resulting model is shown to successfully reproduce the penetration of thermal fluctuations into solid regions, and their subsequent decay across the solid, for a wide range of fluid to solid thermal property ratios, and Prandtl numbers, thereby bringing a step change to RANS capabilities in turbulent conjugate heat transfer analysis.



中文翻译:

共轭传热中温度变化的RANS模型开发

在这项研究中,已开发出湍流共轭热传递的RANS模型,该模型适用于流体和固体热学性质的各种不同组合。这是通过关注温度变化及其在限制流动区域的固体壁上的耗散率的传输方程来实现的。在这项调查中,我们利用了其他研究人员报告的范围更广的DNS数据,以加深我们对所涉及过程的理解,并修订和扩展了Craft等人模型的功能[ 12 工艺TJIacovides HUapipatanakul S. 走向共轭传热RANS模型的发展。J湍流。2010 ; 11(26):116 [Google Scholar]在热波动消散方面包含了更物理的流固界面条件,以及模型系数对Prandtl数的依赖性。结果模型表明,对于宽范围的流体与固体热性质比和Prandtl数,热波动成功地渗透到固体区域,并且随后在整个固体中衰减,从而使RANS的能力发生了阶跃变化。湍流共轭换热分析。

更新日期:2021-03-02
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