According to Bernoulli's theorem the pressure of water should remain uniform in a pipe of uniform radius. But, actually it goes on decreasing why is it so?
Dear student ,
Absence of pressure gradient means the flow is not accelerating as can be seen using Euler’s inviscid equation too. As the velocity remains constant then the flow isn’t accelerating hence no pressure gradient is required to keep it in motion (in case of no viscosity/friction). But, to start a flow either a potential gradient or a pressure difference will be needed.
Regards
Absence of pressure gradient means the flow is not accelerating as can be seen using Euler’s inviscid equation too. As the velocity remains constant then the flow isn’t accelerating hence no pressure gradient is required to keep it in motion (in case of no viscosity/friction). But, to start a flow either a potential gradient or a pressure difference will be needed.
Regards