A Logarithmic Turbulent Heat Transfer Model in Applications with Liquid Metals for Pr=0.01-0.025

被引：9
作者：
Da Via, Roberto [1 ]
Giovacchini, Valentina [2 ]
Manservisi, Sandro [2 ]
机构：
[1] CINECA, SuperComp Applicat & Innovat Dept, I-40033 Bologna, Italy
[2] Univ Bologna, Montecuccolino Lab, DIN, I-40136 Bologna, Italy
来源：
APPLIED SCIENCES-BASEL | 2020年 / 10卷 / 12期
关键词：
turbulent heat transfer; low-Prandtl fluids; RANS modeling; logarithmic turbulence model; PREDICTING FLUID-FLOW; REATTACHING FLOWS; CHANNEL FLOW; SIMULATIONS; REYNOLDS; CONVECTION; DNS;
D O I：
10.3390/app10124337
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The study of turbulent heat transfer in liquid metal flows has gained interest because of applications in several industrial fields. The common assumption of similarity between the dynamical and thermal turbulence, namely, the Reynolds analogy, has been proven to be invalid for these fluids. Many methods have been proposed in order to overcome the difficulties encountered in a proper definition of the turbulent heat flux, such as global or local correlations for the turbulent Prandtl number and four parameter turbulence models. In this work we assess a four parameter logarithmic turbulence model for liquid metals based on the Reynolds Averaged Navier-Stokes (RAN) approach. Several simulation results considering fluids with Pr=0.01 and Pr=0.025 are reported in order to show the validity of this approach. The Kays turbulence model is also assessed and compared with integral heat transfer correlations for a wide range of Peclet numbers.
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页数：17
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