Newton-Krylov Method in Applications of Solving Two-phase Problems using Drift Flux Model
In this paper, Jacobian-free Newton-Krylov (JFNK) method is investigated in an application to implicitly solve two-phase flow problems using four-equation drift flux model. The closure models include the EPRI drift flux correlations and additional constitutive models to determine flow regimes, wall boiling and interfacial heat/mass transfer, two-phase flow wall friction, etc. Different from many traditional computer codes, fully implicit methods are used for the time integration. The resulted nonlinear discretized equation system is solved using the JFNK method. Expensive and error prone derivation and implementation of the analytical Jacobian matrix are avoided. Numerical results are successfully validated using existing experimental data on flow boiling under forced convection conditions in both pipe and rod bundle geometries.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1482983
- Report Number(s):
- INL/CON-15-36793-Rev000
- Resource Relation:
- Conference: 2016 International Congress on Advances in Nuclear Power Plants (ICAPP 2016), San Francisco, CA, 04/17/2016 - 04/20/2016
- Country of Publication:
- United States
- Language:
- English
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