During the reflood phase, following a loss-of-coolant-accident (LOCA), the main mechanism for the precursory cooling of the fuel is by convective heat transfer to the vapor, with the vapor being cooled by the evaporation of the entrained saturated droplets. However, it is believed that the droplets that reach the rod could have an effect on this cooling process. Despite the fact that those droplets do not actually wet the fuel rod due to the formation of a vapor film that sustains them and prevents them from touching the wall, the temperature drop caused by the impingement of such water droplets on a very hot solid surface (whose temperature is beyond the Leidenfrost temperature (1966, “A Track About Some Qualities of Common Water,” Int. J. Heat Mass Transfer, 9, pp. 1153–1166)) is of the order of (2008, The Role of Entrained Droplets in Precursory Cooling During PWR Post-LOCA Reflood, TOPSAFE, Dubrovnik, Croatia, 1995, “Heat Transfer During Liquid Contact on Superheated Surfaces,” ASME J. Heat Transfer, 117, pp. 693–697). The associated heat flux is of the order of and the heat extracted is in the range of 0.05 J over the time period of the interaction (a few ms) (2008, The Role of Entrained Droplets in Precursory Cooling During PWR Post-LOCA Reflood, TOPSAFE, Dubrovnik, Croatia, 1995, “Heat Transfer During Liquid Contact on Superheated Surfaces,” ASME J. Heat Transfer, 117, pp. 693–697). The hydrodynamic behavior of the droplets upon impingement is reported to affect the heat transfer effectiveness of the droplets. In the dispersed flow regime the droplets are more likely to impinge on the hot surface at a very small angle sliding along the solid wall, still without actually touching it, and remaining in a close proximity for a much larger time period. This changes the heat transfer behavior of the droplet. Here, we investigate numerically the hydrodynamics of the impingement of such droplets on a hot solid surface at various incident angles and various velocities of approach. For our simulations, we use a computational fluid dynamics (CFD), finite-volume computational algorithm (TransAT©). The level set method is used for the tracking of the interface. We present three-dimensional results of those impinging droplets. The validation of our simulation is done against experimental data already available in the literature. Then, we compare the findings of those results with previous correlations.
Skip Nav Destination
e-mail: d.chatzikiriakou@imperial.ac.uk
Article navigation
October 2010
Research Papers
Three Dimensional Modeling of the Hydrodynamics of Oblique Droplet-Hot Wall Interactions During the Reflood Phase After a LOCA
D. Chatzikyriakou,
D. Chatzikyriakou
Department of Mechanical Engineering,
e-mail: d.chatzikiriakou@imperial.ac.uk
Imperial College London
, Exhibition Road, London SW7 2AZ, UK
Search for other works by this author on:
S. P. Walker,
S. P. Walker
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, UK
Search for other works by this author on:
B. Belhouachi,
B. Belhouachi
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, UK
Search for other works by this author on:
C. Narayanan,
C. Narayanan
ASCOMP GmbH
, Technoparkstrasse 1, 8005 Zurich, Switzerland
Search for other works by this author on:
D. Lakehal,
D. Lakehal
ASCOMP GmbH
, Technoparkstrasse 1, 8005 Zurich, Switzerland
Search for other works by this author on:
G. F. Hewitt
G. F. Hewitt
Department of Chemical Engineering and Chemical Technology,
Imperial College
, Prince Consort Road, London SW7 2BY, UK
Search for other works by this author on:
D. Chatzikyriakou
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, UKe-mail: d.chatzikiriakou@imperial.ac.uk
S. P. Walker
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, UK
B. Belhouachi
Department of Mechanical Engineering,
Imperial College London
, Exhibition Road, London SW7 2AZ, UK
C. Narayanan
ASCOMP GmbH
, Technoparkstrasse 1, 8005 Zurich, Switzerland
D. Lakehal
ASCOMP GmbH
, Technoparkstrasse 1, 8005 Zurich, Switzerland
G. F. Hewitt
Department of Chemical Engineering and Chemical Technology,
Imperial College
, Prince Consort Road, London SW7 2BY, UKJ. Eng. Gas Turbines Power. Oct 2010, 132(10): 102914 (6 pages)
Published Online: July 7, 2010
Article history
Received:
July 29, 2009
Revised:
August 4, 2009
Online:
July 7, 2010
Published:
July 7, 2010
Citation
Chatzikyriakou, D., Walker, S. P., Belhouachi, B., Narayanan, C., Lakehal, D., and Hewitt, G. F. (July 7, 2010). "Three Dimensional Modeling of the Hydrodynamics of Oblique Droplet-Hot Wall Interactions During the Reflood Phase After a LOCA." ASME. J. Eng. Gas Turbines Power. October 2010; 132(10): 102914. https://doi.org/10.1115/1.4000867
Download citation file:
Get Email Alerts
Cited By
Blade Excitation Alleviation of a Nozzleless Radial Turbine by Casing Treatment Based on Reduced Order Mode
J. Eng. Gas Turbines Power
Design And Testing of a Compact, Reverse Brayton Cycle, Air (R729) Cooling Machine
J. Eng. Gas Turbines Power
Experimental Study on Liquid Jet Trajectory in Cross Flow of Swirling Air at Elevated Pressure Condition
J. Eng. Gas Turbines Power
Related Articles
Hydrodynamics of the Interceptor Analysis Via Both Ultrareduced Model Test and Dynamic Computational Fluid Dynamics Simulation
J. Offshore Mech. Arct. Eng (April,2017)
A Combined Numerical and Experimental Study of Hydrodynamics for an Air-Water External Loop Airlift Reactor
J. Fluids Eng (February,2011)
Discussion: “Effect of Tip Clearance on the Thermal and Hydrodynamic Performance of a Shrouded Pin Fin Array” ( Moores, K. A., and Joshi, Y. K., 2003, ASME J. Heat Transfer, 125, pp. 999–1006)
J. Heat Transfer (August,2006)
Identification and Investigation of Extreme Events Using an Arbitrary Lagrangian–Eulerian Approach With a Laplace Equation Solver and Coupling to a Navier–Stokes Solver
J. Offshore Mech. Arct. Eng (December,2023)
Related Proceedings Papers
Related Chapters
The Influence of Particle Inconsistency Problem on the First Derivative in Smoothed Particle Hydrodynamics
International Conference on Mechanical Engineering and Technology (ICMET-London 2011)
The Numerical Scheme for the History Force Integrals in Hydrodynamics
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Modeling Fluid-Structure Interaction in Cavitation Erosion using Smoothed Particle Hydrodynamics
Proceedings of the 10th International Symposium on Cavitation (CAV2018)