Abstract
A water storage tank is proposed to be used at the heavy damage of water supply lines in a city. Though the tank is a part of water pipeline in usual case, it works as the storage tank for drinking water at the emergency case like as an earthquake. As water is used for drinking, it is not expecting to have spoiled water in the stagnation zones. In this study several inlet nozzles were tested in the CFD, flow visualization and concentration measurement in a one fifth scale transparent model of the storage tank. It is shown from the results that the axial angle of water injection from the center line of the cylinder is important parameter to control the flow in the tank. Difference of flow rate brings various flow patterns at the beginning and show almost same patterns finally. The exchange rates of water are independent from the flow rate.
