Fluid Mechanics: Upstream Pressure Distribution

In summary, upstream pressure distribution in fluid mechanics refers to the variation in pressure as a fluid flows upstream. It is typically measured using a pressure transducer and can be affected by factors such as channel or pipe shape, fluid velocity, and obstacles. It can impact overall flow and can be predicted through various equations, but may require simplifications and assumptions.
  • #1
JJ21
12
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A few things I don't quite get... about why the surface pressure distribution UPSTREAM of the separation point of a body is different to the theoretical or ideal distribution...?

I can see why there will be a difference between the theoretical static pressure distribution but not why the surface pressure distribution upstream will change.

Thanks
 
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  • #2
Any ideas...?
 

1. What is the definition of upstream pressure distribution in fluid mechanics?

Upstream pressure distribution refers to the variation in pressure that occurs in a fluid flow as it moves upstream, against the direction of flow. This is typically seen in open channel flow or flow through pipes.

2. How is upstream pressure distribution measured?

Upstream pressure distribution is often measured using a pressure transducer, which converts pressure into an electrical signal that can be recorded and analyzed. Other methods include using manometers or pressure gauges at different points along the flow.

3. What factors affect upstream pressure distribution?

The shape and size of the channel or pipe, the velocity of the fluid, and the presence of obstacles or changes in direction can all affect upstream pressure distribution. Viscosity of the fluid and surface roughness can also play a role.

4. How does upstream pressure distribution impact fluid flow?

Upstream pressure distribution can impact the overall flow of a fluid by influencing the direction and magnitude of the flow. It can also affect the performance of pumps and other hydraulic systems, and can be used to control and manipulate flow in engineering applications.

5. Can upstream pressure distribution be calculated or predicted?

Yes, there are various equations and models that can be used to calculate or predict upstream pressure distribution in different flow scenarios. These include the Bernoulli's equation, the continuity equation, and the Navier-Stokes equations. However, these calculations can be complex and may require simplifications and assumptions.

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