SUGGESTION OF EVALUATION FORMULA FOR TSUNAMI FORCE ACTING ON CYLINDRICAL TANK IN HIGH FROUDE NUMBER RANGE

Abstract

 A flow phenomenon around a tank installed to coast in high Froude number range was discussed for suggestion of simplified safety assessment by using of 3D-CFD and experimental result of retrospective report. Validation of 3D-CFD was carried out with a tsunami flow and force under supercritical flow conditions. From the numerical result, we clarified that it was need to estimate not only hydrostatic fluid pressure but also reduction of static pressure caused by generation of dynamic pressure for tsunami force prediction. In addition, this value was best explained by dynamic pressure difference calculated from surface and bottom velocity. Formulated tsunami force prediction equation based on this study was in good agreement with experimental result.