Ad: https://happyshirtsnp.com/ UNSTEADY FLOW IN PIPES When water is flowing through a pipe is suddenly stopped by the use of valve then we can see sudden rise in pressure inside the pipe and this pressure waves transmitted along the length of the pipe and it creates knocking like sound effects knows as 'water hammer'. In doing so, there are rapid pressure oscillation in the pipe, often accompanied by a hammering like sound, this phenomenon is called as 'Water hammer effect'. Sometimes the pressure may rise to the greater extent and may causes serious damage to the pipe. Therefore the 'water hammer' effects should be properly studied in the pipes. The magnitude of pressure rise depends on: i) Speed at which the valve is closed (ii) The velocity of flow (V) (iii) The length of the pipe (L) (iv) Elastic properties of pipe material (E) and flowing fluid (K).
This blog ioecivilengineer.blogspot.com is for educational and informative purpose mainly focused on civil engineering students. It provides notes, pdf, different topics blogs, past question and it's solution of IOE exams.