The sloshing phenomenon is well understood in regular cylindrical and rectangular liquid tanks subjected to earthquake. Seismic behavior of water in sectored annular tank which is located in advanced reactor is not well understood and found necessary to investigate the subject in detail. For this, the annular tank is modeled along with water and the numerical simulation is carried out. The sinusoidal and simulated earthquake motion is applied separately as a volume force. For the earthquake case, time history is generated compatible to the design floor response spectrum. The water free surface has been captured by Volume of Fluid (VOF) technique and Navier Strokes equations are solved by Finite volume method. Results such as sloshing heights and shear forces generated in the water considering with and without structure interaction effects have been presented. The wavelet analysis is performed to show the frequency variation along the time.

Keywords: Fluid structure interaction, Earthquake, Volume of fluid, Sloshing.