Timeline for What is the physical meaning of Navier-Stokes equations?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Sep 29, 2020 at 9:24 | answer | added | Nishan ugqyx | timeline score: 0 | |
| Nov 15, 2019 at 1:46 | comment | added | 2b-t | Then he keeps talking about restrictions regarding resolution. He states you are not able to resolve all particles in the atmosphere. In fact in continuum based methods you never do and it is not even about the particles but instead about estimating relevant ratios of length and time scales. Furthermore numerical solutions blowing up has nothing to do with the Navier-Stokes but with deficits of discretisation. This video in my opinion is so imprecise it is just a waste of time. If you read two paragraphs on Wikipedia you are far better off. | |
| Nov 15, 2019 at 1:38 | comment | added | 2b-t | This simplified version of the conservation equations can't and Navier-Stokes in general can't as it is limited to continuum flows so it does not describe any fluid. Then the explanation of Reynolds averaging is not correct: Reynolds averaging is time averaging not spatial averaging. Comments like "fundamentally fluids - they just are turbulent - not every fluid but air water..." (14:40) are just wrong. Turbulence is never an inherent property of a fluid but instead of the flow! | |
| Nov 15, 2019 at 1:36 | comment | added | 2b-t | @BowlOfRed Most of the reasoning in this video is either wrong or very weak. First of all the equations presented are for incompressible fluid only and is lacking the energy equation. Furthermore it is given in differential notation so it already excludes discontinuities such as shocks. Additionally it silently imply Newtonian fluid with constant material values (constant viscosity). Yet he keeps talking about that this set of equations can describe any fluid and general and beautiful it is. | |
| Nov 12, 2019 at 21:32 | answer | added | 2b-t | timeline score: 3 | |
| Nov 12, 2019 at 19:16 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
edited title
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| Nov 12, 2019 at 19:16 | answer | added | Qmechanic♦ | timeline score: 2 | |
| Nov 12, 2019 at 19:12 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
edited tags; edited title; edited tags
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| Nov 12, 2019 at 18:05 | comment | added | BowlOfRed | youtu.be/ERBVFcutl3M | |
| Nov 12, 2019 at 18:05 | review | First posts | |||
| Nov 12, 2019 at 18:12 | |||||
| Nov 12, 2019 at 18:03 | history | asked | ak_87 | CC BY-SA 4.0 |