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GATE Past Year Questions: Flow Through Pipes | Fluid Mechanics for Mechanical Engineering PDF Download
[2013]Question for GATE Past Year Questions: Flow Through PipesTry yourself:For steady, fully developed flow Inside straight pipe of diameter D, neglecting gravity effects, the pressure drop Δp over a length L and the wall shear stress tW are related by
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[2009]Question for GATE Past Year Questions: Flow Through PipesTry yourself:Water at 25°C is flowing throug a 1.0 km long G.I. pipe of 200 mm diameter at the rate of 0.07 m3/s. If value of Darcy friction factor for this pipe is 0.02 and density of water is 1000 kg/m3, the pumping power (in kW) required to maintain the flow is
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FAQs on GATE Past Year Questions: Flow Through Pipes - Fluid Mechanics for Mechanical Engineering
| 1. What is flow through pipes? |  |
Flow through pipes refers to the movement of fluid, such as water or gas, through a pipe or series of pipes. It is an important concept in fluid mechanics and is commonly encountered in various engineering applications, including plumbing, irrigation systems, and industrial processes.
| 2. What factors affect the flow rate through pipes? | |
Several factors influence the flow rate through pipes. These include the diameter and length of the pipe, the viscosity of the fluid, the pressure difference between the two ends of the pipe, and the presence of any restrictions or obstacles in the pipe, such as bends or valves.
| 3. How is flow rate calculated in pipe systems? | |
The flow rate in pipe systems is typically calculated using the equation derived from Bernoulli's principle and the laws of conservation of mass. The equation is known as the Continuity Equation and is given by Q = A * V, where Q is the flow rate, A is the cross-sectional area of the pipe, and V is the average velocity of the fluid.
| 4. How does pipe diameter affect the flow rate? | |
Pipe diameter has a significant influence on the flow rate. According to the Continuity Equation, as the pipe diameter increases, the cross-sectional area of the pipe also increases. This results in a larger flow area for the fluid to pass through, leading to an increased flow rate. Conversely, a smaller pipe diameter would restrict the flow and result in a lower flow rate.
| 5. What is the significance of Reynolds number in pipe flow? | |
Reynolds number is a dimensionless parameter used to predict the flow characteristics in pipe systems. It is calculated based on the fluid properties, pipe dimensions, and flow velocity. The Reynolds number helps determine whether the flow is laminar or turbulent. In laminar flow, the fluid moves in smooth, parallel layers, while in turbulent flow, the fluid exhibits chaotic, irregular motion. The transition from laminar to turbulent flow is influenced by the Reynolds number, with higher Reynolds numbers indicating a higher tendency for turbulent flow.
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