react-text: 398 In a recent paper it has been shown that the presence of liquid has an influence on Flow Induced Pulsations (FIPs) in closed side branches. Even larger effects of liquid in case of whistling in corrugated pipes were reported. For this experimental study, the "Tandem configuration" with two closed side branches along a main pipe is considered. It is characterized by the distance between the two... /react-text react-text: 399 /react-text [Show full abstract]