Numerical Simulation of Aerosol Behavior in Turbulent Natural Convection

Ohira, Hiroaki

doi:10.1080/18811248.2002.9715256

Cited by 4 publications

(2 citation statements)

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“…It should be noted that all velocities in this section were plotted for every other mesh for clarity. This distribution was similar to that of Case 1,4) since the reaction force of the drag force acting on the aerosols were neglected; the maximum value was about 0.6 (m/s) and a pair of large vortices, which fluctuated periodically, appeared in a wide area of the cover gas region. Case 4 also had a similar distribution to the above two cases.…”

Section: Resultsmentioning

confidence: 55%

“…Hence, for the design of reliable components and for assessing the overall safety of LMFRs, it is necessary to evaluate the above mentioned behavior in detail by considering these complex phenomena. Although theoretical and experimental studies [1][2][3] have been reported, the previous model 4) only considered effects of the aerosol growth. In the previous paper, 4) methods were described for calculating the aerosol behavior in the cover gas region and the calculation results of basic heat transfer tests were presented.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Aerosol Behavior in Turbulent Natural Convection

Ohira¹

2003

Journal of Nuclear Science and Technology

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In order to evaluate the aerosol behavior in detail in the cover gas region of LMFRs, a numerical method was developed by considering the aerosol radius as one of the space coordinates. In this method, the governing equations for the compressible gas were approximated by removing the sound wave in order to efficiently calculate the temperature field with a large gradient. The convection terms of these equations were discretized by the 3rd order upwind scheme which was derived for an irregular spaced staggered mesh system. Although it was shown in a previous study that this method was reasonable by calculating basic heat transfer tests of the cover gas region, it is desirable to improve the method in order to achieve more accurate results. In this study, advanced models were developed which simulate the interaction between the mixed gas and aerosols in the flow field. A comparison of the calculated results vs. the experimental results indicated good agreement of temperature distribution. In addition, the aerosol mass concentration in the cover gas region could be evaluated much better with this advanced model.

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Section: Resultsmentioning

confidence: 55%