5.2 Continuum Modeling of Pebble Radiation
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Fig. 5.16 Current solution of Approximation Function Model (AFM) with radiative and conductive
heat transfer for TF-PBEC experiment
Fig. 5.17 Current solution of AFM for HTTU experiments of 20 kW tests (a) and 82 kW tests (b)
diameter. The experiments are conducted under the heat power of 20 and 82 kW. The
axial temperature gradient can still be neglected. The numerical solutions of AFM
for the HTTU experiment are shown in Fig. 5.17. It is seen that the results of the
current model are still in good agreement with the measurements. Thus, it can be
concluded that the current Approximation Function Model (AFM) provides a good
prediction for the combined radiative and conductive heat transfer in a packed pebble
bed.