Numerical Analysis of Heat Transfer Test of Supercritical Water in a Tube Using the Three-Dimensional Two-Fluid Model Code

The three-dimensional two-fluid model analysis code ACE-3D is developed in Japan Atomic Energy Agency for the thermal design procedure on two-phase flow thermal-hydraulics of light water-cooled reactors. In order to perform thermal hydraulic analysis of SCWR, ACE-3D is enhanced to supercritical pressure region. As a result, it is confirmed that transient change in subcritical and supercritical pressure region can be simulated smoothly using ACE-3D, that ACE-3D can predict the results of the past heat transfer experiment in the supercritical pressure condition, and that introduction of thermal conductivity effect of the wall restrains fluctuation of wall.

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A Comparative Investigation of Flow Structures in Three-Dimensional Supercritical Water and Gas-Solid Fluidized Bed via Two-Fluid Model Simulations

The Journal of Supercritical Fluids ◽

10.1016/j.supflu.2021.105515 ◽

2022 ◽

pp. 105515

Author(s):

Kenan Xi ◽

Qiang Guo ◽

Lixing Zhao ◽

Youjun Lu

Keyword(s):

Fluidized Bed ◽

Supercritical Water ◽

Fluid Model ◽

Three Dimensional ◽

Comparative Investigation ◽

Flow Structures ◽

Model Simulations ◽

Two Fluid Model ◽

Two Fluid

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Numerical Analysis on Heat Transfer-Characteristics of Supercritical Pressure Water in a Heated Tube Based on Three Dimensional Two-Fluid Model

Volume 4: Thermal Hydraulics ◽

10.1115/icone21-16435 ◽

2013 ◽

Author(s):

Yasuo Ose ◽

Takayuki Suzuki ◽

Takeharu Misawa ◽

Hiroyuki Yoshida ◽

Kazuyuki Takase

Keyword(s):

Heat Transfer ◽

Fluid Model ◽

Three Dimensional ◽

Heat Transfer Characteristics ◽

Heated Tube ◽

Transfer Characteristics ◽

Pressure Water ◽

Two Fluid Model ◽

Two Fluid ◽

Supercritical Pressure Water

In Japan Atomic Energy Agency (JAEA), the three-dimensional two-fluid model analysis code considering the supercritical pressure water based on ACE-3D (Advanced Code for Evaluation of 3-Dimensional two-phase flow) has been developed to establish the thermal-hydraulics design by numerical analytical approach for the Super Critical Water Reactor (SCWR). In this paper, in order to evaluate the prediction accuracy of ACE-3D for the heat transfer-characteristics at the pseudo critical point, a numerical analysis of the supercritical water using ACE-3D based on the three dimensional two-fluid model has been conducted for simulating the experiments in a heated tube with both upward and downward flow. For the turbulence model in this analysis, both the standard k-ε model and the low-Reynolds number type k-ε model which uses the Launder-Sharma model were examined to investigate the influence of the turbulence model on the heat transfer-characteristics near the heated wall near the pseudo critical point. As a result, it was found that the numerical results of wall temperature using the low-Reynolds number k-ε model for upward flow in a heated tube were in good agreement with experimental data compared with that of using the standard k-ε model.

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