Hey everyone, as part of a university project working on renewable energy sources in the garden I am performing some simple fluid dynamics analysis to calculate the pump power needed to feature in this garden water feature. I have designed the schematics of the feature and worked out the following: Flow rate = 0.0001875m^3/s Pipe length = 7.6633m of which 0.357m of length is a curve with a radius of curvature of 0.25m Fluid head (vertical distance from starting position to lifted position) = 1.65m Reynolds number of around 1500 (as this will keep it laminar which should help keep down energy usage. Now as far as i know the only thing i need left for a formula for pump power would be the friction created by the pipes, and i currently dont have a pipe diametre or material, so these are my questions: 1. I did initially plan to use garden hose but i suspect it may be hard to find the coeffeciant of friction for this so it may be better to use copper pipping as i think there should be some good books in the library on measured values. If anyone knows of any specific books that would be a great help! 2. What equation would i then use to calculate pump power as i have looked through my fluid dynamics notes and cant locate anything that will help me. Im assuming i may also need to use the friction coeffeciant to calculate a friction factor so if anyone knows of the correct equation that would be very much appreciated! 3. I know from experiance that friction in bends can be difficult to calculate as its mostly done via experimentation but i have tried to keep the bend as smooth as possible to reduce friction so is there any decent equations or estimations i could use to account for the bend? Thanks in advance for any help i can get.