I'm watching the very last scene of the finale, and something was bothering me. When the Seanchan arrive, they summon a tsunami to announce their return.

That's fine with me. They're not as good as the Seafolk with water weaving, but I'll assume they trained this particular maneuver.

What bothers me is the distance and scope. They arrive up to a coastline that is all cliff face. A Tall cliff face, I'd estimate 50-100m, but I'm only doing best guess estimates. Their ships are roughly 500 m offshore.

The summon a massive wave and send it to the coastline. By the time is reaches the coast, the wave is 20-30 m tall, and traveling at a medium to fast velocity.

I have a number of question. The first being, where does all the water come from? The ships behind the generate wave neither raise nor lower with the changing water. The boats don't even move. So, where does all the water come from? You can't create water with the power. You only get to shape the water already present.

Second question, When that massive wall of water splashes into the even larger cliff face, where is it all going to go? It can't climb over the cliff, even at the speed the water is traveling, that cliff is too high. So, all that energy would get reflected back out to sea. I don't think 500m is far enough out to minimize the impact of a 20m wave. So, they're going to mess up their own ships.

Lastly, and this is the biggest issue, why attack there at all. From all vantage points shown in the film, this is a barren stretch of rock face, >50m high. The rocks don't care about the waves. The other people, living on top of the cliffs won't care about some extra large wave crashing into the cliff. Go to a port. Make a massive wave at the mouth of the port, and remove any nautical challengers immediately.

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https://youtu.be/XqjWo1yEOvA

This video is about the physics behind music theory and I care about this topic a bit too much. Music theory is built on a foundation that doesn't get questioned much, and it can be so rewarding to dig up that foundation and examine it. 'Cause if you do you'll find that all of it, resonance and harmonics and consonance and functional harmony, are all connected.

Which one is more difficult?

I like to research and get used to equations before class, what concepts should I get cozy with?

What is each class?

What math, (trig Calc Calc II Statics etc.) is used most?

What challenges should I be ready for?

I'm not well versed in either, although I've learned a little bit about aerodynamics. I'm curious to know if the principles of aerodynamics are loosely interchangeable with fluid dynamics. For instance, the movement of a propeller pulling forward in air or water.

I keep trying to fix my jagged power supply line in the graph, and I keep tracing it back to my fuel plant. I have 600 m of oil going to an array of refineries making fuel and plastic and rubber, and it's all perfectly balanced. I mess around with it and ensure that the manifolds fill up on the inlet and outlet sides, and get it all running prefectly, and as long as I stay there it's beautiful.

If I move to the next plant over the field and come back, it's all wacked again.

Hi! I’m looking for PhD students interested in the intersection of machine learning and physics, particularly chaos and fluid dynamics. I'm also informally looking for postdocs (official ad coming soon).

About

We are based in the physics department at UT Austin, and are affiliated with the Oden Institute for Computational Engineering & Sciences. Here is a link to the lab website

Projects are pretty flexible based on curiosity and mutual interest; there’s room for more algorithm-focused time series mining projects, as well as pencil-and-paper dynamical systems and control theory problems. As far as applications go, we’re particularly interested in projects that can eventually be used for biological data or fluid dynamics. We’re super open to applicants from uncommon academic or personal backgrounds

Here are some recent examples:

• “Chaos as an interpretable benchmark for forecasting and data-driven modelling” (NeurIPS 2021) https://arxiv.org/abs/2110.05266
• “Deep reconstruction of strange attractors from time series” (NeurIPS 2020) https://arxiv.org/abs/2002.05909
• “Cellular automata as convolutional neural networks” (Phys Rev E 2019) https://arxiv.org/abs/1809.02942

Applying

For grad students, feel free to apply to any of these grad programs at UT Austin:

• The physics department (due 12/1)
• The Oden CSEM program (due 12/15).
• Other departments (CS, EE) are probably possible, too

For postdocs, please reach out to me informally.

Our physics PhD program does not require physics GRE, normal GRE, or a physics undergrad degree. There are only four core courses, and we have previously had students with undergrads in CS, engineering, bioinformatics, etc. Our quals are research talks, not written exams

If any of this sounds interesting, feel free to email/DM me or chat with me at NeurIPS or APS

A two-dimensional flow field is formed by adding a source of velocity potential: ϕ2 = Q*ln(r)/2*pi At the origin of the coordinate system relative to the velocity potential: ϕ1 = r2 cos 2θ.

1. Determine the resulting velocity potential of flow ϕ.

2. Determine the components of the radial and tangential velocities.

3. Locate the stagnation points in the upper half of the coordinate plane,(0<θ<π).

the original French transcribtion.

Heart fatigue from vaccines, as shown by fluid dynamics (archive.is)

Summary of Publication:

> Bass-reflex designs can exhibit strong non-linear behaviour around their resonant frequency with significant acoustic losses and parasite noise emission. These phenomena are mainly due to turbulences and flow separation at the port’s inlet and outlet. This work proposes a method to predict the resulting non-linear acoustic losses for a given loudspeaker, enclosure volume and port geometry. The approach consists of coupling computational fluid dynamics (CFD) simulation with loudspeaker non-linear motion modelization. Four different ports geometries mounted on one given loudspeaker enclosure are tested. The computed acoustic losses are compared with measurements and show a good agreement. The obtained results prove that the proposed method can predict non-linear losses with an average error less than 1 dB around the Helmholtz frequency.

• PDF Download: http://www.aes.org/e-lib/download.cfm/20776.pdf?ID=20776
• Permalink: http://www.aes.org/e-lib/browse.cfm?elib=20776
• Affiliations: L-Acoustics
• Authors: Pene, Yves; Horyn, Yoachim; Combet, Christophe
• Publication Date: 2020-05-28
• Introduced at: AES Convention #148 (May 2020)

Hey all, I have a question (I'm also sort of new to reddit). I was wondering if anyone could explain the benefit of the laminar sheathe fluid and its surface friction? Why not just use the walls of the cuvette? Also, in literature, it states that the central fluid tends to be slower than the sheathe fluid around it which compresses the sample fluid. This doesn't make much sense to me however since Bernouilli's principle states that the slower the velocity, the more internal pressure there is at that point, so wouldn't you want to have the sheathe fluid flow slower than the sample fluid?

I took a fluid dynamics class and it's time for the final project. They suggested to write a review of a chapter but I'd like to do something more interesting.

I was hoping someone here had an idea for a project where I use the equations learned in class to answer a question, investigate some phenomenon, or graph the results of something. Basically apply something from the class with python and hopefully make a pretty graphic.

Hi Mechanical Engineering,

I am lost and I need your help. A bit of context I am an ECE student, and I have to put together a system (Mech, Electrical and Software) that has a substantial mechanical engineering design portion to it.

The part I am most conflicted about is how the pressures and flow will increase/decrease in my system. I looked up putting two pumps in parallel and from what I have gathered is that this setup would double the flow and the pressure would remain the same. However in all the info I found online, they assume let's say input 1: from pump 1 to T-fitting has pressure p and surface area s, input 2: from pump 2 to T-fitting has pressure p and surface area s, but the output of the t-fitting would have a surface area of 2s, which makes sense how I would have double the flow, but pressure P at the output. But what if in my system the T fitting with 2 inputs and 1 output has the same surface area on all input/output, shouldn't this mean I get double the pressure?

The application this is used in, is plumbing four 25g CO2 cartridges together using fittings to get a 100g CO2 tank, however I would preferably not want to deal with 4 x 800 PSI in my system. I ultimately want more stored CO2 but not this much pressure. I would use a larger 90g cartridge, however they are too tall for our system.

Any help, suggestions and feedback is appreciated. Thank you very much

edit: added a picture

https://preview.redd.it/ej0t03679gz71.jpg?width=7328&format=pjpg&auto=webp&s=2faf645afb43d422318dc4ee900e4fd7afcad76a

I’ve doing some research into non Newtonian fluids specifically dilatant or fluids that appear to be dilatant (have an increase in viscosity when force is applied). I’m working on a project where I need a fluid that can be be liquid and easily allow a slow moving object to pass through but to provide resistant and to slow down a fast moving object. My issue is I don’t have a way of holding the liquid in place since any objects passing through a container would cause a leek and all the liquid would spill out. My idea was if you can have a liquid that’s both a non Newtonian dilatant liquid and a ferrofluid then it could be held by magnets in place. Is this something that is possible? Or does anyone have any suggestions or book suggestions. I’m not sure where to direct my research.

Edit: sorry for any vagueness. I’ll clarify some on what my end goal is. I’m trying to use a dilatant or similar liquid to effectively stop something like a bullet while also preserving the bullet at least somewhat rather than having it shatter and spray shrapnel like it would on a steel plate. This is my main issue with wanting it to be magnetic because it eliminates the need for a container which would have holes after the first shot.
I’m trying to make a target for target practice not something to actually use for protection just to clarify.

Am I going to be ok

Edit: Final grades are in.

Fluid Mechanics A

Dynamics A-

Thermodynamics B-

Reading the text and solving practice problems daily was key. I still had enough free time to go out with friends and enjoy the semester. I was sleep deprived most of the time, but that was my own fault because I wasn't very efficient with my time and I would browse reddit when I should have beeen in bed. Put in the hours and trust the process and you can do it.

What are some unexplained phenomena you discovered in fluid dynamics that can be observed in our everyday lives?

Hello,

I am in the middle of tier8. I have set up a basic aluminum factory to get enough ingots for casings and sheets to manually put into assemblers to open the other things. But the al stops all the time. I have tried a few things already suggested in this reddit but it does not make sense to me what, exactly is happening.

I have two water generators creating 120pm ea and two al scrap refineries taking 180pm ea. That means I need 360pm water. The al ingot refiner generates 120pm water so since that totals to 360pm, I feed that back into the line for the scrap refineries. But the thing stops all the time. What am I missing? I lowered the efficiency of the water generators, added a valve, I added a coal generator but it is either running at very low efficiency or again, just stops. The problem is definitely the output of the ingot refinery as it the water output always becomes too full.

Any help would be appreciated. I thought I understood the fluids in this game, having set up a heavy oil/diluted fuel generation plant but I do not understand why this is not working.

I have an astrophysics fluid dynamics project due and I haven't come up with an idea. It could be anything from programming a flow diagram to making an interesting prediction. Though it doesn't have to be about relativistic fluid dynamics, the professor seemed to insinuate it had to be, though he didn't make it explicit. However if I present something cool, he'll accept it regardless of what it is.

I don't know if this would work, but I know that black holes have jets of matter that shoot out for some reason, maybe that could be explained by relativistic fluid dynamics? But I wouldn't know where to find detailed mathematical information.

Any ideas for a project like this are very appreciated, thanks in advance!

Hey all, I have a question (I'm also sort of new to reddit). I was wondering if anyone could explain the benefit of the laminar sheathe fluid and its surface friction? What stops us from just using the walls of the cuvette and varying the sample fluid flow rate in order to "push" the sample to the center? Also, in the literature, it states that the central fluid tends to be slower than the sheathe fluid around it which compresses the central fluid. It also states that it is "using Bernouilli's principle." This doesn't make much sense to me, however; since Bernouilli's principle states that the slower the velocity; the more internal pressure there is at that point. So wouldn't you want to have the sheathe fluid flow slower than the sample fluid? I have a pretty rudimentary understanding of physics and engineering (like very very rudimentary) and would love to learn! Thank you in advance!