Numerical simulation and experiment of gas-solid two phase flow and ash deposition on a novel heat transfer surface

This paper addresses the numerical simulation of two-phase flow heat transfer in the helically coiled tubes of an integral type pressurized water reactor steam generator under normal operation using a computational fluid dynamics code. The shell-side flow field where a single-phase fluid flows in the downward direction is also calculated in conjunction with the tube-side two-phase flow characteristics. For the calculation of tube-side two-phase flow, the inhomogeneous two-fluid model is used. Both the Rensselaer Polytechnic Institute wall boiling model and the bulk boiling model are implemented for the numerical simulations of boiling-induced two-phase flow in a vertical straight pipe and channel, and the computed results are compared with the available measured data. The conjugate heat transfer analysis method is employed to calculate the conduction in the tube wall with finite thickness and the convections in the internal and external fluids simultaneously so as to match the fluid-wall-fluid interface conditions properly. Both the internal and external turbulent flows are simulated using the standard k-ε model. From the results of the present numerical simulation, it is shown that the bulk boiling model can be applied to the simulation of two-phase flow in the helically coiled steam generator tubes. In addition, the present simulation method is considered to be physically plausible in the light of discussions on the computed results.

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Evaluation Method for Two-Phase Flow and Heat Transfer in a Feed-Water Heater. Numerical Simulation of Gas-Liquid Two-Phase Flow Behavior with Condensation Heat Transfer.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.59.3891 ◽

1993 ◽

Vol 59 (568) ◽

pp. 3891-3898 ◽

Cited By ~ 1

Author(s):

Kazuhide Takamori ◽

Akihiko Minato

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Evaluation Method ◽

Two Phase Flow ◽

Flow Behavior ◽

Feed Water ◽

Phase Flow ◽

Water Heater ◽

Two Phase ◽

Flow And Heat Transfer

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Numerical Simulation of Subcooled Flow Boiling Heat Transfer in Helical Tubes

Heat Transfer, Volume 2 ◽

10.1115/imece2006-14276 ◽

2006 ◽

Author(s):

Jong Chull Jo ◽

Woong Sik Kim ◽

Chang-Yong Choi ◽

Yong Kab Lee

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Steam Generator ◽

Two Phase Flow ◽

Flow Boiling ◽

Heat Transfer Analysis ◽

Normal Operation ◽

Phase Flow ◽

Two Phase ◽

Pressurized Water

This paper addresses the numerical simulation of two phase flow heat transfer in the helically coiled tubes of an integral type pressurized water reactor steam generator under normal operation using a CFD code. The single phase flow which flow downward direction in the shell side is also calculated together. For the calculation of tube side two-phase flow the inhomogeneous two-fluid model is used. Both the RPI (Rensselaer Polytechnic Institute) wall boiling model and the bulk boiling model are implemented for the numerical simulation and the computed results are compared with the available measured data. The conjugate heat transfer analysis method is employed to calculate the conduction in the tube wall with finite thickness and the convections in the internal and external fluids simultaneously so as to match the fluid-wall-fluid interface conditions properly. Both the internal and external turbulent flows are simulated using the standard k-ε model From the results of present numerical simulation, it is shown that the bulk boiling model can be applied to the simulation of two-phase flow in the helically coiled steam generator tubes. The results also show that the present simulation method is considered to be physically plausible when the computed results are compared with available previous experimental and numerical studies.

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