# Tag Info

## Hot answers tagged fluid-mechanics

5

A Negligible difference If the anchor and chain weighed 116 tons... Compare to the weight of the unflooded Titanic: 52,310 tons So the anchor & chain was 116/52310 = .22% of the total weight of the vessel. Considering that once water starts pouring in, the percentage only gets less, so getting rid of the chain would have no measurable effect on the ...

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It depends on factors such as the pressure of downwind flow, the shape of the nozzle. whether the stream is twisting (it will expand faster and lose pressure). Usually in small fans, the equi-pressure contour lines are like an oblong onion layered off-center, expanding irregularly and losing energy within 10-20 times the diameter of the fan. Unless the fan ...

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According to this article: A Phased Approach to Optimized Robotic Assembly for the 777X drilling multi-material composites does require some special trickery, especially when automated assembly is part of the process: There were lessons learned relating to process capabilities whereby technologies were added or modified to prevent the need to return to hole ...

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One explanation I seem to remember (in another lifetime) was that the supersonic nozzle offers higher pressure drop through dropping the density. Figure: subsonic nozzle and diffuser source: wikipedia In a subsonic flow air can be considered as incompressible. However, in the case of supersonic (or close to supersonic) the air can be considered ...

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A supersonic nozzle needs space to contain the sonic shock wave. The shock wave does the work of converging the flow.

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The arc length (AL) of a function z(x) is given by: $$AL = \int_{x_A}^{x_B}\sqrt{1+\left[z'(x)\right]^2}dx$$ so you need to make the proper conversion and solve the integral (This seems to me like a homework exercise, so I won't provide the numerical solution until I've seen what you've tried so far).

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With respect to the ground, an airplane tears up the air it goes through - the disturbance isn't uniform it's unsteady, it moves across the world. With respect to the airplane, the air flows around it the same way all the time. Airflow around the plane is uniform and steady.

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There are many applications where the nozzles are just a straight short pipe. in sprinklers, household faucets and shower heads. in many simple paint pumps they use cheap disposable plastic straight nozzles.

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