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Пікірлер
@DanFrederiksen Ай бұрын
It looks cool and nicely segmented but is it actually useful? is the simulation close enough to reality to tell one design from another or is it just pretty pictures
@TerragonCFD Ай бұрын
impressive simulation! 🙂
@TranHanhDungVLVQ 3 ай бұрын
What software did you use for the simulation? it is great
@JeanLulu-pf7fr 7 ай бұрын
Sorry, I think the tail rotor turn on other side.
@alansilvaeng 7 ай бұрын
O sentido do expiração está errado para o passo direito
@sgtellioman 9 ай бұрын
This gives fractal zooms a serious run for their money.
@tatotaytoman5934 9 ай бұрын
what is the forward slat for
@davidtyrrell9534 9 ай бұрын
Extending chord length
@debelaalema8130 9 ай бұрын
good simulation. better if you add the procedure on how to do it.
@odnorob Жыл бұрын
its great really
@user-wn1jf7pg6x Жыл бұрын
why 4 vortices? why not 1 or 2 of them? please help
@dhanushkawijethunga Жыл бұрын
Is there models to calculate the lift forces acting on the blade. Do manufacturers of helicopters have to do these CFD simulations in order to caculate these things? If that's the case how did they develop earlier helicopters?
@oneracfd8725 Жыл бұрын
Hi, yes there are simpler models to get the lift and drag forces for this configuration for instance based on lifting line and vortex wake models. But CFD can provide much more accurate information on boundary layer and vortices interactions. Besides, it can provide data for acoustic propagation.
@dhanushkawijethunga Жыл бұрын
@@oneracfd8725 Thank you so much for uploading these stuff.
@_Z_D Жыл бұрын
Can you explain what this is
@oneracfd8725 Жыл бұрын
Hi, this is a classical test case for CFD numerical schemes. See for instance : en.wikipedia.org/wiki/Taylor%E2%80%93Green_vortex
@persontran Жыл бұрын
Why is this in my recommendations?
@v2ike6udik Жыл бұрын
because you are an NPC who thinks google is your mama, spoonfeeding you only your kinks. choose ofans. :)
@starman7906 Жыл бұрын
Is it possible to share the amount of ram required for the method and 1Bn element.
@dongncku Жыл бұрын
may I ask, what is the variable you are showing?
@oneracfd8725 Жыл бұрын
Hi, the first part shows isolines of Q-criterion and the second part shows an isosurface of Q-criterion colored by vorticity magnitude.
@bradmiller9507 Жыл бұрын
Thanks. Lag time is Bad.
@VijayAdithya1208 Жыл бұрын
please tell us the software name
@oneracfd8725 Жыл бұрын
Hi, Navier-Stokes solver is onera code fast ( fast.onera.fr) and post/pre/viz is done with Cassiopee (cassiopee.onera.fr).
@madtscientist8853 Жыл бұрын
Can I just ask why does it sound like you have Titanic singing in the background?
@aspidinton Жыл бұрын
looks cool, no idea why 0 comments tho
@mamatalu Жыл бұрын
Stunning! thank you for posting this video! More please!
@augusto6952 Жыл бұрын
Impressive in such a level that can not be described in words
@arezoonajafian797 Жыл бұрын
Hi Great, How can we simulate this figure in Ansys fluent? If you have any ideas, could you share them with me? tnx. Also How do you put its oscillating movement?
@arezoonajafian797 Жыл бұрын
Hi Great, How can we simulate this figure in Ansys fluent? If you have any ideas, could you share them with me? tnx. Also How do you put its oscillating movement?
@akashprakash3965 Жыл бұрын
Sir please provide the full tutorial
@alondjeckto Жыл бұрын
This is fuckin beautiful
@O-cDxA Жыл бұрын
Why is there high pressure at the trailing edges of the wings and tail/ rudder ?
@YetiSoft 11 ай бұрын
Because the trailing edge has some non-zero angle, and two streams (above and below the wing, or from left and right side of the rudder) are colliding with each other. Google "cfd 2d airfoil pressure" and in images you can find similar effect for low angle of attack.
@roanflugelengenharia6124 Жыл бұрын
Que coisa maravilhosa
@thedeerish Жыл бұрын
What is a heat flux streak?
@Chleosl Жыл бұрын
Dose compression of airflow calculated very rapidly and short-timing?
@filipesrubio4015 Жыл бұрын
Basicly, here in Europe, maple syrup is not as easy to encounter as in North America. We have good honey, dont get me wrong, but its not the same as when I used to go to aunt Marcela's place to enjoy a nice apple pie. Keep up the good comments!
@klebermarcio1317 Жыл бұрын
WOW !!!
@hamedmohamadian2437 2 жыл бұрын
Soooo beautiful
@dimn0198 2 жыл бұрын
hâte de le voir voler ^^
@kerimsay3148 2 жыл бұрын
I saw blade has conctant flap angle in simulation. I wonder flapping motion is included in simulation or not. I mean Helicopter blade rotates flapping motion and it has different angle with respect to azimuth angle.
@oneracfd8725 2 жыл бұрын
Hello, blade flapping, lead-lag and pitch variation during rotation are taken into account in this simulation.
@Just-Steve 2 жыл бұрын
That leading blade vs trailing blade lift differential was a big deal in the two blade AH-1 Cobra.
@brahemharbaa8120 2 жыл бұрын
perfect, how can i obtain the CAD model of this aircraft?
@Vipcioo 2 жыл бұрын
RC helicopter model RC pilots have processed 80% of your problems in quite a few years. So I don't see what we have to admire?
@Deuce501st 2 жыл бұрын
I'm not sure what I see around 0:21 - 0:32 🤣🤣🤣
@Just-Steve 2 жыл бұрын
What do you mean?
@muhammadfikri-ve8oq 2 жыл бұрын
Use les ? Urans ? Or dns ? Thats amazing
@christianlabanca5377 2 жыл бұрын
It appears LES
@oneracfd8725 2 жыл бұрын
Hello, in this simulation RANS model (Spalart Almaras) is used near the blades and LES in the remaining part of the computational domain.
@hubertley939 2 жыл бұрын
Given the amount of work that went into building this model, it would be very interesting to learn more about what specific goal it was built for. Was it the demonstration of sliding meshes, demonstration of software capabilities, or a specific physical aspect? I assume that this is just a prescribed motion of the blades, and not coupled with structural mechanics to analyze forces on the blades, fluid structure interaction, or lift forces. Even as a pure CFD model, this is very powerful in showing the interaction of complex blade motion with the air in the domain. There is of course always the question what software was used to build and run this model, how stable it is, and so on. This represents a ton of work. Excellent video.
@romainchallenger7465 2 жыл бұрын
this represents a ton of computing time rather
@arckrz721 2 жыл бұрын
Wich size of RAM did you use?
@ProjectPhysX 2 жыл бұрын
The simulations and the visualization with your software is really amazing. Much kudos! I wrote similar CFD software, have a look at my KZbin channel :)
@robert_hensing 2 жыл бұрын
If you add some explanation at the start instead of in the description, I think this video could really take off... :D As someone with a tiny bit of science background, iso surface is something I can manage, but Q criteria and vorticity magnitude are alien to me. Anyway, I'm glad the algorithm sent me here. It was nice to watch blade angle of attack change and to see the whole thing.
@oneracfd8725 2 жыл бұрын
Hello, thanks for the comment. We'll try to take it into account for our next videos.
@eeehmeow6899 2 жыл бұрын
We paint the air not ur wall the next level ^,^....
@tatotaytoman5934 2 жыл бұрын
the sheer amount of computation necessary just to perform one rotation
@jidhindharanm.p9351 2 жыл бұрын
Exactly lol..first thing that came to mind just from seeing the thumbail
@oneracfd8725 2 жыл бұрын
Hello, CFD (computational Fluid Dynamics) requires an accurate mesh for solving the equations of fluid motion. For accurately solving the boundary layer, the first cell on blade wall must have a height of 2 mm for this simulation. For accurately solving the wake and main blade vortex, cells of length 2 cm must be used. This leads to a mesh of 4.1 billion cells representing about 2000Gb of data. Thats why we need to perform the simulation in parallel on HPC clusters. But it enables to predict unsteady loads, transcient phenomena that deteriorate the rotor performance and radiated noise (tonal and broadband to some extent).
@bradmiller9507 2 жыл бұрын
Would it differ in "Other" atmospheres than our Earth ??
@Resch72113 2 жыл бұрын
What program is this? Ty
@aileronhelicopters 2 жыл бұрын
CFD
@Resch72113 2 жыл бұрын
@@aileronhelicopters “Where’d you get that cheeseburger?” “Fast food”
@bawwmemeg 2 жыл бұрын
What software
@plantzengineering9925 Жыл бұрын
@@Resch72113 that actually made me spit my drink out 😂
@AnimateMJ Жыл бұрын
@@Resch72113me die 😂😂😂😂
@christianlabanca5377 2 жыл бұрын
impressive
@renelaplanche7201 3 жыл бұрын
Étonnant on dirai qu’il ce crée un vide D airs ça devrai imploser genre cavitation
@seerat_bhat 3 жыл бұрын
Dear, could you please share a complete video of this simulation with me