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2d
comment To what depth can a whirlpool descend?
I would guess the right answer contains (in)compressibility.
Aug
23
comment The pressure in a container of water is based on depth. So what happens if I remove the bottom of the container?
@sonicboom If you consider the container only, you will have to account for the mass flowing out as well. Think of what your control volume for the balance equation is.
Aug
23
comment The pressure in a container of water is based on depth. So what happens if I remove the bottom of the container?
Maybe a good analogy is weightlessness in free fall.
Aug
15
comment Confusion about the resonance
I think this question would be a good question if it did not have the second paragraph on the example. Would you consider editing it?
Aug
15
comment Delayed choice measurement subsequent analysis
There is not question here?
Aug
9
comment Will I sunburn faster when driving compared to being parked?
I tried to edited the question to more stress the difference between driving/not driving. In my opinion sunburn is just a fancy term for photon flux. I hope this does not conflict wit @AlexBroadhead intents.
Aug
5
comment Why is the Reynolds number “the way it is?” Why is its order the way it is?
I'm curious what steady state turbulent flow looks like :)
Aug
4
comment Velocity profile of a viscously damped wave
Just some thoughts. If $u'_x$ is a perturbation, why would $K$ be non-zero? Do I understand correctly that you have periodic conditions? I assume you did not linearize your simulation, so how convinced are you that the linearization is justified? Is amplitude really the only difference between your analytical and numerical analysis (i.e, normalized you have agreement?)
Jul
10
comment Is there a simple equivalent to Ohm's law for gas (pressure=R*throughput)?
In your venturi equation and mass convervation you are assuming constant density. Is that actually the case for what you are studying?
Jul
10
comment With a machete, why is a diagonal cut more effective than a right angle one?
Maybe the internal structure of what you are cutting plays a role as well?
Jul
10
comment Is there a simple equivalent to Ohm's law for gas (pressure=R*throughput)?
In my opinion this question is much better when leaving out your specific situation.
Jul
8
comment Is the vortex in a kitchen sink an example of a singularity?
My point is that in the vortex in the sink, there typically is a vertical velocity component.
Jul
8
comment Is the vortex in a kitchen sink an example of a singularity?
What about the third dimension?
Jul
1
comment How to emulate 40ft (12 m) of water?
@JohnRennie You put water in your bicycle tyres?
Jun
30
comment Sedimentation at the bottom of a vessel
Did you look into the field of fluidized beds? I can imagine there are relevant similarities.
Jun
29
comment Is it possible to hear trains when you live nothing near them?
Thought about this: youtube.com/watch?v=2kDORB3vR8s
Jun
28
comment Can gravity in principle be made to flow through a “wire”?
What about a waterfall?
Jun
28
comment Acceleration derivative
Your last equation is dimensionally incorrect.
Jun
28
comment Estimate the amount of atoms in the smallest speck of matter you can see with the naked eye
1) How did you transform volume to amount of atoms? 2) Why did you pick a sphere, and not just a disk-like volume?
Jun
28
comment Numerically summing a divergent series
Also, I think this question would be much more appropriate on Computational Sciense SE.