Imperial College London
Portrait Picture

Dr Giovanni Giustini

Faculty of Engineering, Department of Mechanical Engineering

Honorary Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 9681g.giustini12 Website

 
 
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Location

 

City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Murallidharan:2016:10.1016/j.net.2016.06.004,
author = {Murallidharan, J and Giustini, G and Sato, Y and Niceno, B and Badalassi, V and Walker, SP},
doi = {10.1016/j.net.2016.06.004},
journal = {Nuclear Engineering and Technology},
pages = {859--869},
title = {Computational Fluid Dynamic Simulation of Single Bubble Growth under High-Pressure Pool Boiling Conditions},
url = {http://dx.doi.org/10.1016/j.net.2016.06.004},
volume = {48},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Component-scale modeling of boiling is predominantly based on the Eulerian–Eulerian two-fluid approach. Within this framework, wall boiling is accounted for via the Rensselaer Polytechnic Institute (RPI) model and, within this model, the bubble is characterized using three main parameters: departure diameter (D), nucleation site density (N), and departure frequency (f). Typically, the magnitudes of these three parameters are obtained from empirical correlations. However, in recent years, efforts have been directed toward mechanistic modeling of the boiling process. Of the three parameters mentioned above, the departure diameter (D) is least affected by the intrinsic uncertainties of the nucleate boiling process. This feature, along with its prominence within the RPI boiling model, has made it the primary candidate for mechanistic modeling ventures. Mechanistic modeling of D is mostly carried out through solving of force balance equations on the bubble. Forces incorporated in these equations are formulated as functions of the radius of the bubble and have been developed for, and applied to, low-pressure conditions only. Conversely, for high-pressure conditions, no mechanistic information is available regarding the growth rates of bubbles and the forces acting on them. In this study, we use direct numerical simulation coupled with an interface tracking method to simulate bubble growth under high (up to 45 bar) pressure, to obtain the kind of mechanistic information required for an RPI-type approach. In this study, we compare the resulting bubble growth rate curves with predictions made with existing experimental data.
AU  - Murallidharan,J
AU  - Giustini,G
AU  - Sato,Y
AU  - Niceno,B
AU  - Badalassi,V
AU  - Walker,SP
DO  - 10.1016/j.net.2016.06.004
EP  - 869
PY  - 2016///
SN  - 1738-5733
SP  - 859
TI  - Computational Fluid Dynamic Simulation of Single Bubble Growth under High-Pressure Pool Boiling Conditions
T2  - Nuclear Engineering and Technology
UR  - http://dx.doi.org/10.1016/j.net.2016.06.004
UR  - http://hdl.handle.net/10044/1/41679
VL  - 48
ER  -
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