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Published: 2021-09-03
Abstract Views: 196
Views PDF: 43
DOI: https://doi.org/10.53747/jnst.v9i4.132
Issue
Vol. 9 No. 4 (2019)
Section
Articles
How to Cite
K., T., G., K., & K., U. (2021). Bubble behavior in liquid-gas two-phase flow behind a cross-shaped obstacle in a vertical circular duct. Nuclear Science and Technology, 9(4), 1-8. https://doi.org/10.53747/jnst.v9i4.132

Bubble behavior in liquid-gas two-phase flow behind a cross-shaped obstacle in a vertical circular duct

K. Takase1, G. Kawasaki1, K. Ueta1
1 Department of Nuclear System Safety Engineering, Nagaoka University of Technology, Japan

Main Article Content

Abstract

Grid spacers installed in subchannels of fuel assemblies for nuclear reactors can promote heat transfer. However, the fluid velocity and bubble behavior are greatly affected as the cross-sectional area of the flow passage changes. Therefore, the void fraction distribution behind the obstacle that simulates the grid spacer shape simply was measured by using a wire mesh sensor (WMS) system. Moreover, a two-phase flow analysis was performed to investigate the effect of the obstacle on the bubble behavior in a vertical duct.

Article Details

Keywords

Bubbler, Two-phase flow, Obstacle, Vertical duct, WMS, Experiment, Analysis

References

[1]. Prasser, H. M., Böttger, A. and Zschau, J., “A New Electrode-Mesh Tomograph for Gas-Liquid Flows,” Flow Measurement and Instrumentation, 9, 1998.
[2]. H. M. Prasser, H. M., Krepper E. and Lucas, D., “Fast Wire-Mesh Sensors for Gas-Liquid Flows and Decomposition of Gas Fraction Profiles According to Bubble Size Classes”, Second Japanese-European Two-Phase Flow Group Meeting, Tsukuba, Japan, September, 25-29, 2000.
[3]. Prasser, H. M., Scholz, D., and Zippe, C., 2001, “Bubble Size Measurement Using Wire-Mesh Sensors”, Flow Measurement and Instrumentation, 12, 4, 2001.
[4]. Douce1, A., Mimouni1, A.., Guingo1, M., Morel2, M., J. Laviéville1, J. and Baudry1, C., “Validation of Neptune CFD 1.0.8 for Adiabatic Bubbly Flow and Boiling Flow”, CFD4NRS-3, September, 14-16, Washington DC, USA, 2010.