Temperature and eddy diffusivity profiles in NaK

Sleicher, C. A.; Awad, A. S.; Notter, Robert H.

doi:10.1016/0017-9310(73)90184-1

Cited by 57 publications

(12 citation statements)

References 11 publications

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“…In this Figure, correlation data from different experiments, such as lead, lead-bismuth, bismuth and sodium, are mixed with the aim to obtain a law valid for all liquid metals. The interested reader can see details for each experiment in [29][30][31][32][33][34][35][36]. For low values of Peclet numbers (Pe < 1000) the Kirillov curve is the correlation that fits better all the experimental points [4,34].…”

Section: Cylindrical Pipe Testsmentioning

confidence: 99%

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

2020

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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 P r = 0.01 and P r = 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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Section: Cylindrical Pipe Testsmentioning

confidence: 99%

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

2020

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“…As we can see the correlation gives values of the Nusselt number which are much greater than the ones of the other correlations. The Skupinski and Sleicher correlations (57, 58) were obtained using experimental heat transfer data of NaK [28,29]. Ibragimov derived (59) using experimental data of LBE heat transfer while (60) is based on values of heat transfer obtained using mercury by Stromquist [30,31].…”

Section: Re τmentioning

confidence: 99%

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

Vià¹,

Manservisi²,

Giovacchini³

2020

Preprint

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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 not valid 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 or four parameter turbulence models. In this work we assess a four parameter logarithmic turbulence model for liquid metals based on RANS 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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“…Sleicher [24] performed several experimental investigations on the local heat transfer coefficients for NaK flows in ducts with different boundary conditions. The author concluded that, in the case of uniform wall temperature, the heat transfer coefficients are lower than in the case of uniform heat flux: …”

Section: Empiric Correlation Researchedmentioning

confidence: 99%

Performance of Dish-Stirling CSP system with dislocated engine

Kaliakatsos

Cucumo

Ferraro

et al. 2015

Int J Energy Environ Eng

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In this paper, a Dish-Stirling Concentrating Solar Power (CSP) system was examined in which the engine works no longer as a receiver but is displaced away from it. In this arrangement it is necessary to adopt a heat transfer fluid capable of transmitting the useful power from the receiver to the hot spring in the Stirling engine head. Various components of the system need designing and especially the heat exchanger in charge of transferring power to the engine head thanks to the cooling of the fluid. The Dish-Stirling system under study includes a linear piston Stirling engine of 4 kW total rated power (3 kW thermal and 1 kW electric). The minimum temperature for starting of the engine is 190°C, while the maximum is 565°C. There are many innovative aspects of dish Concentrating Solar Power systems with Stirling engine dislocated, for example, the possibility of using an increased number of engines powered by a single greater dish and energy savings in the solar tracking system. The work covers the search for the most suitable fluids for the purpose, risks and benefit evaluation of fluids never used previously in the field of solar concentration. The heat exchanger sizing was carried out examining different geometric configurations. The study was conducted using a computer and setting up thermo-fluid dynamics simulations in the ANSYS 14.5 environment. Finally, the results were tested and validated through a comparison study with empirical correlations found in the literature.

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Temperature and eddy diffusivity profiles in NaK

Cited by 57 publications

References 11 publications

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

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

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

Performance of Dish-Stirling CSP system with dislocated engine

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