Pressure Relations in Pipe Flow of Viscous Fluid

In summary, the conversation discusses the effects of friction and "minor losses" on the head and pressure in pipe flow of a viscous fluid. It is noted that losses reduce the total pressure and are dissipated as heat, leading to a higher fluid temperature. The conversation also mentions the hose ID, air pressure, and flow rate, and requests a description with a formula.
  • #1
redargon
368
0
In pipe flow of a viscous fluid, what happens to the head lost due to friction and "minor losses" (pipe bends, valves, etc).?I mean, if you decrease the dynamic pressure by reducing flow velocity, then the static pressure increases. If the dynamic pressure increases then the static pressure decreases, but the total pressure is always constant. Do losses reduce the total pressure?
 
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  • #2
Yes, losses reduce the total pressure and are dissipated as heat.
 
  • #3
So would the heat be dissipated into the fluid and into the pipe. ie. would the fluid temperature increase if there were fricitonal and minor losses (which i assume are frictional in nature too)?
 
  • #4
Yes, fluid heats up as. A part of the heat is conducted away by the pipe & rest heats up the fluid to a higher temperature.
 
  • #5
Excellent, thanks for your replies
 
  • #6
Hi All
Hose ID 8mm, air pressure 0.5 kg/cm2, what will be the flowrate.
Please describe with formula.
 

1. What is the definition of pressure in pipe flow?

The pressure in pipe flow refers to the force per unit area acting on the walls of the pipe. It is caused by the viscous forces of the fluid as it flows through the pipe.

2. How does the pressure in a pipe change with fluid viscosity?

The pressure in a pipe is directly proportional to the viscosity of the fluid. This means that as the viscosity of the fluid increases, so does the pressure in the pipe.

3. What are the factors that affect pressure in pipe flow?

The pressure in pipe flow is affected by various factors such as the flow rate, pipe diameter, fluid density, and fluid viscosity. Changes in any of these factors can cause a change in pressure.

4. How does pipe diameter affect pressure in pipe flow?

The pressure in pipe flow is inversely proportional to the square of the pipe diameter. This means that as the diameter of the pipe increases, the pressure decreases and vice versa.

5. What is the significance of pressure in pipe flow of viscous fluids?

The pressure in pipe flow of viscous fluids is important in determining the flow rate and energy losses in the system. It also affects the stability and efficiency of the flow, making it a crucial factor to consider in fluid dynamics and engineering applications.

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