- #1
dom_quixote
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Are these hydrodynamic effects the same?
Hydrodynamics Effects: Are They the Same?
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In summary, the two discussed hydrodynamic effects, the Coanda effect and ram pressure, are different phenomena. The Coanda effect involves a parallel flow that remains attached due to fluid viscosity and velocity variation in the boundary layer, while ram pressure involves a perpendicular flow that creates pressure due to unbalanced kinetic energy. In a separate experiment, the speaker observed a similar "sucking" effect between a hose nozzle and a flat lid, which is caused by the Bernoulli effect. This effect is due to the difference in fluid velocity between the bottom and top of the hose nozzle.
- #2
Baluncore
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No, they are different effects.
Coanda effect; https://en.wikipedia.org/wiki/Coandă_effect
Ram pressure; https://en.wikipedia.org/wiki/Ram_pressure
In one, the flow is parallel to the surface and remains attached due to fluid viscosity and the velocity variation in the boundary layer.
In the other, the flow is perpendicular and provides a pressure due to unbalanced kinetic energy; KE = ½·m·v² .
Maybe you are seeing some other phenomenon. You need to explain the process you are referring to, or observing, in each case.
Coanda effect; https://en.wikipedia.org/wiki/Coandă_effect
Ram pressure; https://en.wikipedia.org/wiki/Ram_pressure
In one, the flow is parallel to the surface and remains attached due to fluid viscosity and the velocity variation in the boundary layer.
In the other, the flow is perpendicular and provides a pressure due to unbalanced kinetic energy; KE = ½·m·v² .
Maybe you are seeing some other phenomenon. You need to explain the process you are referring to, or observing, in each case.
- #3
dom_quixote
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Thanks Baluncore!
I did a variation of the second experiment with a bucket. I did not film the experiment due to the difficulty of observing the phenomenon. However, the hose nozzle is also "sucked in" even when the water level rises. Would it be the same effect "RAM Pressure"?
I did a variation of the second experiment with a bucket. I did not film the experiment due to the difficulty of observing the phenomenon. However, the hose nozzle is also "sucked in" even when the water level rises. Would it be the same effect "RAM Pressure"?
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Lnewqban
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Then, for the second part of the video you were referring to the sucking effect between hose end and flat lid.dom_quixote said:
This happens because the Bernoulli effect, as the fluid velocity under the hose nozzle is greater than the one above.
Please, see:
https://en.wikipedia.org/wiki/Bernoulli's_principle
1. What is hydrodynamics and how does it affect objects?
Hydrodynamics is the study of how fluids, such as water, move and interact with objects. It is a branch of fluid dynamics that focuses on the motion of fluids and the forces that act upon them. The effects of hydrodynamics on objects can include drag, lift, and turbulence.
2. Are hydrodynamics effects the same for all objects?
No, hydrodynamics effects can vary depending on the shape, size, and material of an object. For example, a streamlined object will experience less drag than a bulky object when moving through a fluid.
3. How do hydrodynamics effects impact marine vehicles?
Hydrodynamics effects play a crucial role in the design and performance of marine vehicles such as ships, submarines, and boats. Understanding and managing these effects is essential for efficient and safe navigation.
4. Can hydrodynamics effects be controlled or manipulated?
Yes, hydrodynamics effects can be controlled and manipulated through various techniques such as shaping the object to reduce drag, using propulsion systems to counteract drag, and utilizing specialized coatings to reduce turbulence.
5. What are some real-world applications of hydrodynamics effects?
Hydrodynamics effects have numerous real-world applications, including designing more efficient and faster boats, optimizing wind turbine blades, and improving the aerodynamics of airplanes. They also play a significant role in ocean engineering, coastal protection, and environmental studies.
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