Quote:
Originally Posted by riverrat
This is why I am always confused when people say a spray bar does not create as much flow as a pipe. It will create more flow than a pipe for me if you cut it down a little. Less holes for the water to exit from means a faster exit. The volume will remain the same no matter what configuration I assume but the velocity that the water exits is not. Am I wrong here? My plants tell me there is more flow by bending over more?
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River your analysis of the basic fluid dynamics is correct for the modified spraybar with less holes/length. Same volume, more pressure which leads to a faster water velocity. However, have you noticed any filter strain and wear? There's going to a lot of back pressure, and therefore will make your filter work harder to push the same volume out of the output. Like your hose analogy, when you stick your thumb in front of the hose, you can hear the pressure strain as the water tries to rush through.
-John N.