Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
권호 표지

Numerical Analysis of Conjugate Heat Transfer in a Curved Piping System Subjected to Internal Stratified Laminar Flow

층류 열성층유동 곡관에 대한 복합열전달 수치해석

  • Published : 2002.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper addresses a numerical method for predicting transient temperature distributions in the wall of a curved pipe subjected to internal laminar thermally-stratified flow. A simple and convenient numerical method of treating the unsteady conjugate heat transfer in non-orthogonal coordinate systems is presented. Numerical calculations are performed for the transient evolution of thermal stratification in two curved pipes, where one has thick wall and the other has so thin wall that its presence can be negligible in the heat transfer analysis. The predicted results show that the thermally stratified flow and transient conjugate heat transfer in a curved pipe with a finite wall thickness can be satisfactorily analyzed by the present numerical method, and that the neglect of wall thickness in the prediction of pipe wall temperature distributions can provide unacceptably distorted results for the cases of pipes with thick wall such as safety related-piping systems of nuclear power plant.

Keywords

References

  1. Abou-rjeily, Y. and Barois, G., 'Numerical Prediction of Stratified Pipe Flows in PWRs,' Nucl. Eng. & Des., Vo1.147, (1993), pp.47-51
  2. Baron, F., Gabillard, M. and Lacroix, C., 'Experimental Study and Three- Dimensional Prediction of Recirculating and Stratified Pipe Flow in PWR' Proc. NURETH4-Karlsruhe,(1989),pp.1354- 1361
  3. Baik, S.J., Im, I.Y. and Ro, T.S., 'Thermal Stratification in the Surge Line of the Korean Next Generation Reactor,' Pro. OECD NEA/ WANO Special Meeting. Paris, (1998)
  4. Jo, J.C. et. al., 'Three-Dimensional Numerical Analysis of Thermally Stratified Flow in a Curved Piping System,' ASME PVP-Vol. 414-1, (2000), pp.31-48
  5. Patankar, S.V., Numerical Heat Transfer and Fluid Flow, McGraw-Hill, New York, (1980)
  6. Doormal, J.P. Van and Raithby, G.D., 'Enhancements of the SIMPLE Method for Predicting Incompressible Fluid Flows,' Numer. Heat Transfer, Vo1.7, (1984), pp. 147-163
  7. Zhu, J., 'A Low-Diffusive and Oscillation- Free Convection Scheme,' Comm. Appl. Numer. Methods. vo1.7, (1991), pp.225-232
  8. Rhie, C.M. and Chow, W.L., 'Numerical Study of the Turbulent Flow Past an Airfoil with Trailing Edge Separation,' AIAA J., 21-11, (1983), pp.1525- 1532
  9. Ushijima, S., 'Prediction of Thermal Stratification in a Curved Duct with 3D Body-Fitted Co-ordinates,' Int. J. Numer. Methods Fluids, Vo1.19, (1994,), pp.647- 665