유한요소법을 이용한 순수 물의 상변화 과정에 대한 수치해석

Finite Element Analysis on Phase-Change Process of Pure Water

  • 홍영대 (전남대학교 대학원 기계공학과) ;
  • 차경석 (전남대학교 대학원 기계공학과) ;
  • 서석진 (전남대학교 대학원 기계공학과) ;
  • 박찬국 (전남대학교 기계시스템 공학부)
  • 발행 : 2002.12.01

초록

The phase-change transformation processes are relevant in many engineering applications. In particular, this phenomenon plays an important role in the extraction and fabrication operations in the metallurgical industry. The control of the heat transfer and fluid flow patterns is important to achieve casting quality and competitive production times. In the present study, a simple finite-element algorithm is developed for solid-liquid phase change problems. Natural convection in the liquid phase due to the temperature dependency of water density is considered by a numerical model. The predictions are compared with measurements by the particle image velocimetry(PIV). to show that the calculation results are in good agreement with the experiment results.

키워드

참고문헌

  1. Cruchaga, M.A. and Celentano, D.J., 'AFixed-Mesh Finite Element ThermallyCoupled Flow Formulation for The Numerical Analysis of Melting Processes.',Int. J. Numer. Meth. Eneng, Vo1.51(2001),pp.1231-1258
  2. Gong, Z.X. and Mujumdar, A.S., 'Flow andHeat Transfer in Convection -DominatedMelting in a Rectangular Cavity Heatedform Below.', Int. J. Heat Mass Transfer.Vol.41(1998), pp.2573-2580
  3. Giangi, M. and Stella, F. and Kowalewski,T.A., 'Phase Change Problems with FreeConvection:Fixed Grid NumericalSimulation.', Comput Visual Sci. Vo1.2(1990),pp.123-130
  4. Sampath, R. and Zabaras, N. 'An ObjectOriented Implementation of a FrontTracking Finite Element Method forDirectional Solidification Processes.', Int.J. Numer. Meth. Engng. Vo1.44(1999),pp.1227-1265
  5. ozisik, M.N., 'Finite Difference Methodsin Heat Transfer', CRC Press(1994), pp.275
  6. Kohlrausch, F. 'Praktische Physik. Band 3.22. Auflage, Table 22203.' B.G. Teubner.Stuttgart(1968), pp.1692-1693
  7. Cruchaga, M.A and Celentano, DJ., 'Afixed-mesh finite element thermallycoupled flow formulation for the numericalanalysis of melting process.', Int. J.Numer. Meth. Engng, Vol.14(1998),pp719-730
  8. Kowalewski, T.A. and Rebow, M.etal.,'SEMI-IMPLICIT FEM ANALYSIS OFNATURAL CONVECTION IN FREEZINGWATER.', Numerical Heat Transfer,Vo1.36(1999), pp.449-472
  9. 전종국, 박승오, '평면 상변화를 위한 고정 격자계에서의 유한 차분 알고리즘.', 대한기계학회 춘계논문집B(1999), pp.693-698
  10. 윤정인, 김재돌, 외4명, '과냉각을 동반하는물의 동결현상에 관한 실험.', 空氣調和 . 冷凍工學 論文集, 第9券 第2號(1997), pp.104-111
  11. 윤정인, 김재돌, 김성규, '과냉각을 동반한 동결과정에 대한 수치해석.', 空氣調和 . 冷凍工學 論文集 第8券 第4號(1996), pp.451-462