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Abstract of "A HYBRID METHOD FOR NUMERICAL PREDICTION OF ENTHALPY TRANSPORT IN FLUID FLOW"

DOI: 10.1615/ICHMT.2000.TherSieProcVol2.330
104 pages

Zoran Lj. Jovanovic
Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences VINCA, P.O. Box 522, 11001 Belgrade, Yugoslavia

Vladimir D. Stevanovic
Faculty of Mechanical Engineering, 27. marta 80, 11 000 Belgrade, Yugoslavia

Abstract

A hybrid method (HM) is proposed for prediction of convective enthalpy transport and boiling boundary location. The momentum equation is solved with the SIMPLE procedure, while the energy equation is solved with the Method Of Characteristics (MOC) and with the application of the Lagrange interpolation polynomial (LIP). The MOC method is applied on the constant grid. The propagating parameter initial values at the starting points of characteristic paths are calculated with the LIP. The accuracy of the method is demonstrated on tests of the transient boiling boundary prediction and common problem of the propagating discontinuity. The dependence of the hybrid method on the spatial integration step value and the degree of the LIP is analyzed. The LIP of the third degree is recommended, by which obtained are practically exact solutions with acceptable number of nodes.

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