VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg
We improved the computational grid and schemes in the VOF (volume of fluid) method with the standard 𝑘−𝜀 turbulent model in our previous study to evaluate CCFL (countercurrent flow limitation) characteristics in a full-scale PWR hot leg (750 mm diameter), and the calculated CCFL characteristics agre...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2012/935391 |
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| author | M. Murase A. Tomiyama I. Kinoshita Y. Utanohara Chihiro Yanagi T. Takata A. Yamaguchi |
| author_facet | M. Murase A. Tomiyama I. Kinoshita Y. Utanohara Chihiro Yanagi T. Takata A. Yamaguchi |
| author_sort | M. Murase |
| collection | DOAJ |
| description | We improved the computational grid and schemes in the VOF (volume of fluid) method with the standard 𝑘−𝜀 turbulent model in our previous study to evaluate CCFL (countercurrent flow limitation) characteristics in a full-scale PWR hot leg (750 mm diameter), and the calculated CCFL characteristics agreed well with the UPTF data at 1.5 MPa. In this paper, therefore, to evaluate applicability of the VOF method to different fluid properties and a different scale, we did numerical simulations for full-scale air-water conditions and the 1/15-scale air-water tests (50 mm diameter), respectively. The results calculated for full-scale conditions agreed well with CCFL data and showed that CCFL characteristics in the Wallis diagram were mitigated under 1.5 MPa steam-water conditions comparing with air-water flows. However, the results calculated for the 1/15-scale air-water tests greatly underestimated the falling water flow rates in calculations with the standard 𝑘−𝜀 turbulent model, but agreed well with the CCFL data in calculations with a laminar flow model. This indicated that suitable calculation models and conditions should be selected to get good agreement with data for each scale. |
| format | Article |
| id | doaj-art-2439bef587ea467abe8701e57a164121 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-2439bef587ea467abe8701e57a1641212025-02-03T01:21:31ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832012-01-01201210.1155/2012/935391935391VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot LegM. Murase0A. Tomiyama1I. Kinoshita2Y. Utanohara3Chihiro Yanagi4T. Takata5A. Yamaguchi6Institute of Nuclear Technology, Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui 919-1205, JapanDepartment of Mechanical Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, JapanInstitute of Nuclear Technology, Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui 919-1205, JapanInstitute of Nuclear Technology, Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui 919-1205, JapanInstitute of Nuclear Technology, Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui 919-1205, JapanDepartment of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita-shi, Osaka 565-0871, JapanDepartment of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita-shi, Osaka 565-0871, JapanWe improved the computational grid and schemes in the VOF (volume of fluid) method with the standard 𝑘−𝜀 turbulent model in our previous study to evaluate CCFL (countercurrent flow limitation) characteristics in a full-scale PWR hot leg (750 mm diameter), and the calculated CCFL characteristics agreed well with the UPTF data at 1.5 MPa. In this paper, therefore, to evaluate applicability of the VOF method to different fluid properties and a different scale, we did numerical simulations for full-scale air-water conditions and the 1/15-scale air-water tests (50 mm diameter), respectively. The results calculated for full-scale conditions agreed well with CCFL data and showed that CCFL characteristics in the Wallis diagram were mitigated under 1.5 MPa steam-water conditions comparing with air-water flows. However, the results calculated for the 1/15-scale air-water tests greatly underestimated the falling water flow rates in calculations with the standard 𝑘−𝜀 turbulent model, but agreed well with the CCFL data in calculations with a laminar flow model. This indicated that suitable calculation models and conditions should be selected to get good agreement with data for each scale.http://dx.doi.org/10.1155/2012/935391 |
| spellingShingle | M. Murase A. Tomiyama I. Kinoshita Y. Utanohara Chihiro Yanagi T. Takata A. Yamaguchi VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg Science and Technology of Nuclear Installations |
| title | VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg |
| title_full | VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg |
| title_fullStr | VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg |
| title_full_unstemmed | VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg |
| title_short | VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg |
| title_sort | vof calculations of countercurrent gas liquid flow in a pwr hot leg |
| url | http://dx.doi.org/10.1155/2012/935391 |
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