Promising results for adiabatic flows encouraged to extent the HZDR baseline model for other conditions, for example, with phase change, chemical reaction, as well as material systems other than air-water , e. g. Argon-GaInSn. In the present work, it is applied for condensing steam-water flows inside a large vertical pipe.
Figure 1 shows the simulated steam distribution during its condensation in sub-cooled water under different pressure p, inlet sub-cooling degree ΔT as well as orifice size rorifice.
Modelling of interphase heat transfer coefficient is another active research topic. Figure 2 show the evolution of steam volume fraction along the pipe obtained by using the Tomiyam and the Ranz-Marshall correlations.
The poly-disperse iMUSIG-approach is used to capture the change of Sauter mean diameter of steam bubbles at condensation.
- Liao, Y., Lucas, D.
Poly-disperse simulation of condensing steam-water flow inside a large vertical pipe.
International Journal of Thermal Sciences, 104, 194-207
- Liao, Y., et al.
Application of new closure models for bubble coalescence and breakup to steam-water vertical pipe flow.
Nucl. Eng. Des., 279, 126-136
- Liao, Y. et al.
Interfacial heat transfer models for flashing flows: a review.
13th international conference Multiphase Flow in Industrial Plant, Sept.17-19, Genova, Italy
- Liao, Y., et al.
New coalescence and breakup kernels for air-water and steam-water pipe flows.
5th Population Balance Modeling Conference (PBM2013), Bangalore, Indian, Sept. 11-13
- Lucas, D.; Frank, T.; Lifante, C.; Zwart, P.; Burns, A.
Extension of the inhomogeneous MUSIG model for bubble condensation.
Nucl. Eng. Des., 24, 4359-4367
- Krepper, E.; Beyer, M.; Lucas, D.; Schmidtke, M.
A population balance approach considering heat and mass transfer e experiments and CFD simulations.
Nucl. Eng. Des., 241, 2889-2897
- Lucas, D.; Prasser, H.-M.
Steam bubble condensation in sub-cooled water in case of co-current vertical pipe flow.
Nucl. Eng. Des., 237, 497-508