3324409
doi
10.5281/zenodo.3324409
oai:zenodo.org:3324409
user-eu
Ponomarev, Alexander
PSI, Switzerland
Sato, Yohei
PSI, Switzerland
Mikityuk, Konstantin
PSI, Switzerland
Analytical and Experimental Study of Condensation and Collapse of Steam Bubbles at High Jakob Number
Mambelli, Simone
PSI, Switzerland
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
<p>Abrupt collapse of vapour bubbles at high Jakob number is the leading physical phenomenon of the simulated chugging sodium boiling regime occurring during unprotected loss of flow (ULOF) accident in Sodium Fast Reactor (SFR) low-void core designs. The ESFR-SMART Horizon 2020 project aims at a better understanding and simulation of chugging conditions. Therefore, the small-scale two-phase flow facility “CHUG” for the mock-up of sodium boiling using water as sodium simulant has been designed at Paul Scherrer Institut (PSI) and built at the Laboratory of Reactor Systems behaviour at EPF Lausanne. CHUG consists of an acrylic glass test section filled with water at ambient temperature and atmospheric pressure, where high-temperature steam is injected from the bottom in order to study the interaction be-tween vapour and liquid at high sub-cooling level. In this paper the experimental results obtained with CHUG facility are compared with the simulation of bubble collapse in sub-cooled liquid at high Jakob number performed with PSI’s in-house CFD tool PSI-BOIL. The three-dimensional bubble surface during formation and collapse at the orifice is obtained from high-speed imaging and compared to the results from PSI-BOIL simulation, where an interface tracking method based on third-order accurate CIP-CSL2 (Constrained Interpolation Profile – Conservative Semi-Lagrangian 2nd order) method is employed. The main features of inertia-driven bubble collapse are analysed and commented in both cases.</p>
Zenodo
2019-07-11
info:eu-repo/semantics/conferencePaper
3324408
user-eu
award_title=European Sodium Fast Reactor Safety Measures Assessment and Research Tools; award_number=754501; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/754501; funder_id=00k4n6c32; funder_name=European Commission;
1579534427.17122
1205029
md5:d71bc6081efc95f21a99f15ff5a62667
https://zenodo.org/records/3324409/files/2019.05_Mambelli_ICAPP.pdf
public
10.5281/zenodo.3324408
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doi