Pressure
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For the same pipeline, with different diameters, is the pressure the same?
Please clarify the definition of pressure: In physics, pressure refers to the force that acts on the contact surface between two objects, or it is the vertical force exerted by a gas on the surface of a solid or liquid, or the vertical force exerted by a liquid on the surface of a solid. *Conventionally, in mechanics and most engineering disciplines, the term “pressure” is synonymous with pressure in physics.
For a flowing pipeline, the pressure at each point is certainly different; in addition, there is the issue of pressure drop caused by flow turbulence, as well as pressure changes resulting from the height of the liquid column.
In the same pipe, different heights within the pipe result in varying pressures. In a flowing pipe, at the same horizontal level, the pressure varies due to hydrodynamic reasons.
It’s different; the pipe is thinner so the pressure is lower
Bernoulli’s equation: p + 1/2ρv^2 + ρgz = C. If the medium does not flow, it is due to the principle of continuity: the pressure within pipes at the same level should be identical. Under medium flow, pipes and fittings experience pressure drops, resulting in varying pressures at different locations.
This post was last edited by Xiaonian Gao on 2016-6-14 08:50. When the pressure mentioned by the original poster is indeed pressure, then under the same pressure, a larger pipe will surely experience higher pressure. When the pressure referred to by the original poster is in fact pressure intensity, there are different scenarios. When this pipe contains pressurized gas or liquid and no flow occurs, the pressure in the large pipe is the same as that in the small pipe (assuming no consideration of potential energy). When fluid flows within the pipe, under normal circumstances the pressure at the front end of the pipe is higher than that at the rear end, as the fluid moves from areas of high pressure to areas of low pressure. According to Bernoulli’s equation, the flow velocity is higher in narrower sections of the pipe, and pressure is lower in areas with high flow velocities; however, the effect of friction also cannot be ignored. So it’s not absolute
It was clearly explained on the 8th floor – in the process of learning*
I’m here to learn*. When the pipe is filled with fluid, does the diameter of the pipe affect the pressure level?