Numerical Simulation of Aerosol Behavior in Turbulent Natural Convection

概要

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This paper describes the detail numerical methods for the aerosol behavior in the cover gas regions of LMFRs by considering the aerosol growth as one of the space coordinates. The governing equations for the compressible gas were approximated by removing sound waves for the efficient calculations of the large temperature different fields. The convection terms of these equations were discretized by the 3rd order upwind scheme which was derived for irregular staggered mesh. In order to verify this method, a natural convection in the vertically heated enclosure was calculated and the results were compared with the benchmark results by de Vahl Davis. In this calculation, temperature distribution in the enclosure agreed well with each other. The basic heat transfer tests for the cover gas region of LMFRs were also calculated by this method and the calculated vertical average temperature profile of the turbulent cover gas natural convection and the aerosol average mass concentration were compared to the experimental ones. The calculated temperature agreed well with the experimental ones. It was also estimated that the aerosol were well mixed in the natural convection field and the number densities distributed the similar profiles in almost all region except for the region near the top surface.
一般社団法人日本原子力学会の論文
2002-07-25