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Fine mesh for a AGR nuclear fuel bundle

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Old   February 10, 2019, 14:42
Default Fine mesh for a AGR nuclear fuel bundle
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Hi everyone, I am investigating the thermal hydraulics within the fuel bundle of an AGR nuclear reactor. To create a fine mesh one needs to account for the minimum required distance the first cell adjacent to the wall is. Y plus spacing acts as a good estimation for this however I am slightly confused on how to represent the Hydraulic diameter. Does anyone have any suggestions ?

Much appreciated
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