Pressure Relations in Pipe Flow of Viscous Fluid

AI Thread Summary
In pipe flow of a viscous fluid, head loss due to friction and minor losses, such as bends and valves, results in a reduction of total pressure, which is dissipated as heat. When flow velocity decreases, dynamic pressure drops and static pressure increases, but total pressure remains constant. Losses in the system lead to an increase in fluid temperature, as some heat is conducted away by the pipe while the rest raises the fluid's temperature. The discussion also touches on calculating flow rate for a specific hose diameter and air pressure, indicating a need for formulas to determine this. Overall, understanding these pressure relations is crucial for effective fluid dynamics management.
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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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Yes, losses reduce the total pressure and are dissipated as heat.
 
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)?
 
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.
 
Excellent, thanks for your replies
 
Hi All
Hose ID 8mm, air pressure 0.5 kg/cm2, what will be the flowrate.
Please describe with formula.
 
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