Download Slideset ()

Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Top-down view of the rod bundle geometry and its spacer configuration. (a) Cross-sectional image of the 7-rod bundle. Picture
taken from Misawa et al. [12]. (b) Spacer that holds the seven rods apart. Note the small, skew wires (indicated by Y) that keep the
rods apart from the honeycomb structure.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Locations of the thermocouples on each separate heating rod. (a) Axial and (b) azimuthal. The open circles on rod F in (b) indicate
the ones that are not used in this study.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Experimentally obtained rod surface temperatures located at the gap and center regions. The left figures represent case B1 (low
inlet temperature, low power), the right ones case B2 (high inlet temperature, high power). The angles indicate the angular location
of the thermocouple with respect to the rod. The gray, dashed line indicates the pseudocritical temperature of 658 K.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Rod surface temperatures located at the gap and center regions. The left figures represent case B1 (low inlet temperature, low
power), the right ones case B2 (high inlet temperature, high power). The gray squares show all numerical results for all gap-facing
locations; the other symbols indicate measured wall temperatures. The black, dashed line is a polynomial fit of the numerical
results. The gray, dashed line indicates the pseudocritical temperature of 658 K.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Relative average errors with respect to the experiments in cases B1 (low inlet temperature, low power) and B2 (high inlet
temperature, high power). The error is normalized by the difference between the calculated local wall temperature and local bulk
temperature. The dashed line indicates the average error of all numerical contributions. Note that KIT-IKET did not perform
calculations on case B1.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Comparison of rod surface temperatures for case B2 (high inlet temperature, high power) obtained by RANS calculations with large
grids (UMan: 756M; UOttawa: 372M), medium grids (CVREZ: 67M; BME NTI: 42M), and a small grid (KIT-IKET: 18M). These grid sizes
are adjusted to the entire circumferential domain. The gray squares indicate the experimental data in the regions concerned. The
gray, dashed line indicates the pseudocritical temperature of 658 K.
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Comparison of rod surface temperatures obtained by a 1-D approach (CNL, TUD) and RANS calculations with large grids (UMan,
UOttawa: 62M). Note that the lateral discretization by CNL into four subchannels results in wall temperatures facing the center only
(right figure). The gray squares indicate the experimental data in the regions concerned. The gray, dashed line indicates the
pseudocritical temperature of 658 K. The data refer to case B2 (high inlet temperature, high power).
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Comparison of rod surface temperatures obtained by RANS and RANS k–ω calculations. Two organizations (KIT-IKET and UPisa)
applied both models and are therefore more suitable for comparison. Note that UPisa applied a much larger grid than KIT-IKET. The
gray squares indicate the experimental data in the regions concerned. The gray, dashed line indicates the pseudocritical
temperature of 658 K. The data refer to case B2 (high inlet temperature, high power).
Date of download: 7/31/2017
Copyright © ASME. All rights reserved.
From: A Blind, Numerical Benchmark Study on Supercritical Water Heat Transfer Experiments in a 7-Rod
Bundle
ASME J of Nuclear Rad Sci. 2016;2(2):021012-021012-12. doi:10.1115/1.4031949
Figure Legend:
Effect of CHT and FSI. All data refer to case B2 (high-inlet temperature, high power). (a) Circumferential temperature profile (in K) of
rod G for case 1 (w/o CHT and FSI), case 2 (with CHT and w/o FSI), and case 3 (with CHT and FSI) as indicated in Table 2 at the outlet
of the domain. The three cases refer to KITIKET((k–ϵ))(B2). The azimuthal coordinate corresponds to Fig. 3, hence rod G is facing
rod A at θ=90 deg. (b) Comparison of rod surface temperatures in the gap region obtained by RANS k–ω calculations with CHT
(BME NTI) and without CHT (KTH). The average grid resolution is roughly comparable, i.e., BME NTI applied 14M cells in a 1/3
domain, and KTH applied 28M cells in the entire domain. The gray squares indicate the experimental data in the regions concerned.
The gray, dashed line indicates the pseudocritical temperature of 658 K.