[Q&A] June 29, 2017
Thread Content
What are the causes of fluid resistance? Answer: 1. It is related to the viscosity of the fluid; 2. It is related to the flow state of the fluid; 3. It is related to the flow velocity of the fluid, with the resistance loss being proportional to the square of the velocity; 4. It is related to the geometric dimensions of the pipeline and the degree of surface roughness. http://down.hcbbs.cc/attachment/forum/201706/10/203353z7y06fdo70r6eod0.jpg Petrochemical Sector – New Ideas for Energy Saving: The “Creative Thinking” Initiative (The second phase of this initiative is currently in progress) http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1666758 (Source: Haichuan Chemical Industry Forum)
(1) It is related to the viscosity of the fluid; (2) it is related to the flow of the fluid; (3) it is related to the flow velocity of the fluid, with the loss of resistance being proportional to the square of the velocity; (4) it is related to the geometric dimensions of the pipeline and the roughness of its inner wall.
There is the viscous resistance caused by fluid viscosity, as well as the pressure difference resistance resulting from the velocity differences of the fluid surrounding the object.
This post was last edited by wangld on 2017-6-29 08:15. 1. It is related to the viscosity of the fluid; 2. It is related to the flow state of the fluid; 3. It is related to the flow velocity of the fluid, as the friction loss is proportional to the square of the velocity; 4. It is related to the geometric dimensions of the pipeline and the degree of surface roughness.
The first is the viscous resistance caused by fluid viscosity. The second is the pressure difference drag caused by the difference in fluid flow velocity around the object.
Flow rate, fluid resistance, pipe wall friction
Internal friction caused by the viscosity of the fluid
Frictional resistance in straight pipes: The resistance that arises when a fluid flows through a straight pipe section, due to the need to overcome the viscosity of the fluid and the friction between it and the inner wall of the pipe. There is a sticky pipe wall, causing the flow velocity on its surface to drop to 0. Local resistance: the energy loss resulting from vortices that are generated due to sudden changes in flow when the fluid passes through irregularly shaped pipes or fittings.