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Numerical simulations of thermal-mixing in T-junction piping system using large eddy simulation approach

Tanaka, Masaaki  ; Murakami, Satoshi*; Miyake, Yasuhiro*; Ohshima, Hiroyuki

Authors have been developed a numerical simulation code MUGTHES by using the LES to investigate thermal striping phenomena in FBRs. In this paper, numerical simulations by the MUGTHES in T-junction piping system appear. The boundary conditions are chosen from an existing water experiment in JAEA. Numerical results are validated by comparisons with measured velocity and temperature profiles. Through the numerical simulations, generation mechanism of temperature fluctuation in thermal mixing process is revealed in the relation with the large-scale eddy motion.



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