- #1
joh_eng
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In a closed fluidic system (with a pump), fluid velocity is constant throughout the system but what puzzles me is the pressure drop due to viscous effect. In a horizontal pipe, pressure decreases gradually (assuming low friction) down the pipe due to viscous effect. In this concepts, it's hard to comprehend constant velocity (=constant flowrate). In Bernoulli's principles, where total energy is constant along the streamline, if there is pressure drop (static) in a horizontal pipe (where potential energy is zero), dynamic pressure is increased meaning velocity has increased. Can someone pinpoint what I am missing here? Thanks.