Atomization mechanisms of a wall-impinging jet in a shallow pool

Horiguchi, Naoki; Yoshida, Hiroyuki; Kaneko, Akiko*; Abe, Yutaka*

Physics of Fluids, 35(7), p.073309_1 - 073309_17, 2023/07

https://doi.org/10.1063/5.0157032

The atomization of a liquid jet in an immiscible liquid-liquid system is significant for the safety in the nuclear industry field. The Japan Atomic Energy Agency has developed an evaluation method of a melt fuel behavior as a liquid jet in an immiscible liquid-liquid system for subsequence using mechanistic numerical simulation and has investigated liquid jet behavior in a shallow pool through numerical simulations and experiments. The paper clarifies the atomization mechanism in the wall-impinging liquid jet. Herein, the atomization behavior in the wall-impinging liquid jet in a shallow pool in an immiscible liquid-liquid system was studied in terms of droplet formation and flow field using numerical simulation and the dispersed-phase tracking method. The results show that the droplet formation in the liquid film flow of the wall-impinging liquid jet had the three patterns, and we obtained the droplet properties immediately after droplet formation and developed the theoretical criterion regions using the dimensionless numbers for droplet formation. We characterized the patterns by comparing them with the regions and elucidated the droplet formation mechanisms depending on their sources. Moreover, we elucidated that the relationship between droplet formation as the local behaviors of the jet and atomization as the whole behavior.

Estimation of JSNS moderator flowing condition based on impinging jet heat transfer

Aso, Tomokazu; Monde, Masanori*; Sato, Hiroshi; Tatsumoto, Hideki; Kato, Takashi; Ikeda, Yujiro

LA-UR-06-3904, Vol.2, p.385 - 394, 2006/06

no abstracts in English

Thermal-hydraulic experiments and analyses of coupled moderator vessel for spallation neutron source

Aso, Tomokazu; Sato, Hiroshi; Kaminaga, Masanori; Hino, Ryutaro; Monde, Masanori*

Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2003) Koen Rombunshu (No.030-3), p.45 - 46, 2003/09

no abstracts in English

Thermal-hydraulic analyses of decoupled moderator vessels for spallation neutron source, 1; Comparison between analytical results and experimental results on velocity distribution

Sato, Hiroshi; Aso, Tomokazu; Kogawa, Hiroyuki; Hino, Ryutaro

Nihon Kikai Gakkai Kanto Shibu Ibaraki Koenkai (2003) Koen Rombunshu (No.030-3), p.47 - 48, 2003/00

no abstracts in English

Study on flow characteristics in cold source moderator, 2; Flow pattern measurement and analysis, thermal-hydraulic analysis in cold source moderator vessel

Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko; Hino, Ryutaro

JAERI-Tech 99-049, 45 Pages, 1999/06

JAERI-Tech-99-049.pdf:2.62MB

no abstracts in English

Hydraulic experiments and analyses for development of the cold moderator

Aso, Tomokazu; Kaminaga, Masanori; Terada, Atsuhiko*; Hino, Ryutaro

Kashika Joho Gakkai-Shi, 19(Suppl.2), p.127 - 130, 1999/00

no abstracts in English

Application of a two-equation model to heat transfer and fluid flow of an impinging round jet

Kunugi, Tomoaki;

Proc. Int. Symp. on Transport Phenomena in Turbulent Flow, p.509 - 520, 1988/00

no abstracts in English

Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 4; Effects of test conditions on dispersion and sedimentation of molten-material in a shallow water pool

Emura, Yuki; Matsuba, Kenichi; Isozaki, Mikio; Imaizumi, Yuya; Kamiyama, Kenji

no journal, , 

A series of simulation tests discharging a molten alloy with low-melting point into a shallow water pool is being conducted in order to investigate fuel-coolant interaction and sedimentation behavior of molten core materials on the structure of core inlet coolant plenum in the core disruptive accident of sodium-cooled fast reactors. The present study shows effects of the initial temperature of the molten alloy, the confined coolant volume, etc. on the test results.