Typically you can assume air is incompressible below Mach 0.3, so it is a perfectly acceptable simplification here.
@TheOfficialOriginalChad
19 күн бұрын
Correct, but a little out of context, no? I would think it can be simplified like this in open atmosphere, but not in a nozzle, as pressure changes Mach. For example, surely an air compressor moves air at a high pressure but low velocity, but that doesn’t mean the fluid isn’t compressible by an air compressor.
@CubyFormOfB
19 күн бұрын
@@TheOfficialOriginalChad Right, it's all about using the easiest equations you can get away with for a given scenario. In this case, especially being fan powered, I would assume a very low mach with little pressure change.
@edriyin
19 күн бұрын
Nice video, if anyone get curious about fluid simulations, this is actually eulerian control volume. And you don't need compressible flow dynamics in this case. Flow is probably too slow and temperature effect is negligible to create compression. In this problem turbulent flow characteristics is more important. Keep up.
@gianlucatomasello9492
14 күн бұрын
There is a thing with CFD analysis. Simulations are not really that hard to setup, but really hard to comprehend and validate the results. They are not just a bunch of red yellow and green lines.
@802Garage
12 күн бұрын
Too awesome! The comparison between the simulation and the sparkle water flow is amazing. I think some more comparisons with the real camera and virtual camera at the same viewing angle could help with the comparison even more. Great work!
@danturismo
11 күн бұрын
I tried using Simscale about 9 months ago to simulate airflow through a nozzle and I just couldn't figure it out. This is EXACTLY what I needed! Thank you! I've now been able to finish my project 😊
@coder543
19 күн бұрын
I was hoping this was going to be a demo/tutorial of OpenFOAM.
@kevin08750
18 күн бұрын
With OpenFOAM you can to much more 😂
@C-M-E
15 күн бұрын
Same! I have paid sim software but have openFOAM dl'ed and waiting for a few days with free time to try it out.
@nathan22211
15 күн бұрын
only issue with OpenFOAM, at least when I looked at it, it's Linux only so maybe not ideal for him
@martinmckee5333
11 күн бұрын
@@nathan22211Open Foam can be used with Windows as well, though it is more difficult to create custom solvers than on Linux. The basic, built in, solvers work fine though.
@hmramsay
11 күн бұрын
@@nathan22211 can be run in windows as long as you have the windows subsystem for Linux enabled
@DaveEtchells
19 күн бұрын
It’s _insane_ that hobbyists and inventors can sit down at a computer and run CFD modeling for free and in just minutes. Back in the day this would have been hours of processing on a supercomputer. (Although incompressibility does simplify things a whole lot.)
@DemonTied
18 күн бұрын
There is so much free resources on the internet nowadays, it’s absolutely absurd. This ease of sharing and finding free information is the core reason our knowledge and tech is expanding at the accelerated rate that it is. It’s amazing!
@SolonTh
19 күн бұрын
You're doing gods work dude. I've always felt the default cooling on the V400 is insufficient. And this has inspired me to try a custom solution without upgrading the fans
@Chad.The.Flornadian
19 күн бұрын
I love how cool it looks with the simulation. Unprecedented levels of detail you just can't get otherwise.
@VertexCarver
19 күн бұрын
That is a wicked progression on the topic. Thank you for diving into this!
@mobiobione
19 күн бұрын
Well I just followed your video and had wild success! This video has now upgraded my desiging toolbox considerably. Thank you.
@StevenIngram
19 күн бұрын
It seems to me that your test rig could use a mount to attach it to the bowl. Perhaps one that flips up like the arm of a record player so you can change out the ducts like changing the stylus. (I hope I my example isn't too dated. LOL) So, when you lower the arm, it would hold the rig at the same height and location every time. :)
@Daves3DProjects
19 күн бұрын
Wow that's awesome. I wish I had that a while back when I was playing with fan ducts. Keep up the good work!
@SuborbitalSciences
19 күн бұрын
Great work, I’m glad to see that you decided to do this. Thanks for sharing!
@Roy-K
13 күн бұрын
Holy cow, I wanted to use SIMSCALE for some fluid analysis at work something like eight months ago, but I had no idea how to do a proper simulation; thank you so much for this demo/tutorial, and very interesting results on the ducts!
@Kaliumcyanidful
19 күн бұрын
60m/s is a Little fast imo. It is almost 220km/h or 1/6 of the speed of Sound… aka local hurricane. to Calc a realistic value check the volume flow in the datasheet and calc the avg speed with the diameter of the inlet. Ideally add the pipe from the Fan to the inlet into the Simulation.
@leesmithsworkshop
19 күн бұрын
I just followed this with a nozzle I made for the Orbiter V3 on a tool changer mount. will tag you on my community post so you can take a look. It's a simple single duct, but it does work as expected based on your example.
@matts2581
19 күн бұрын
Way slick idea for the particle stuff in the water. !!! :)
@kimmotoivanen
19 күн бұрын
These simulations *could* work IRL, *if* input stream was ideal - laminar flow and constant velocity across area. In reality, that is not the case. Not with turbulent CPAP tube. Very much not with hugely varying flow across 5015 exit. I wouldn't count too much on pretty and fancy looking "science" 😬 (or should we - working with the unseen - say séance 😅) I'm not saying simulation can't be used as *starting point* for testing and refinement based on *measurements and observations* - but until that it's pretty much _assumption in, assumption out_ 🤷♂
@Kaliumcyanidful
19 күн бұрын
Yep. The turbulence could be included a little bit by including the pipe, starting from the Fan and leading to the inlet
@OutOfNameIdeas2
5 күн бұрын
Especially since the 3d printed lines... Extremely turbulent airflow
@gqualls2366
19 күн бұрын
In aerodynamics, “compressible” flow means supersonic flow where you’ll need to calculate shocks, etc.
@kilianlindlbauer8277
19 күн бұрын
Rule of thumb is anything below 100m/s or 1/3 of the speed of sound is incompressible, the error is really marginal, especially when using fans which low maximum pressures. A ws7040 is also very much incompressible
@artspam
19 күн бұрын
It' s a nice iteration on TT's video, with the alternative method of setting up the volume and the different setups. Well done!
@genjitsu7448
16 күн бұрын
Very good video - some great ideas here and that software looks like it could really be a winner.
@charlvanniekerk8009
19 күн бұрын
This is going to be interesting!
@BloodSteyn
18 күн бұрын
Going to have to watch this video a few times to understand it fully, but it looks pretty damn amazing.
@ProductiveAbel99
14 күн бұрын
That is great experiment. as a piece of advice you can use colored air
@PatrickHoodDaniel
19 күн бұрын
Very cool. Question: have you though about a venturi design where you can separate hot and cold air? I know this video is not about the design but more about simulating air flow, but it triggered that thought.
@hangtight71
19 күн бұрын
Been doing this for a while. You will get much more representative results if you specify a volumetric flow rather than a flow velocity. generally for a 5015 the volumetric flow can be considered to be approximately proportional to the total nozzle outlet area/ total fan outlet area, eg a duct with 50% nozzle outlet area compared to the outlet of the blower will have approximately 50% of the maximum blower flow at zero pressure drop.
@dominicafonso
18 күн бұрын
It would be valuable to see the physical model you used as a simulation. I suspect the fluid surface behaviour will be quite different to the air flow.
@brocktechnology
19 күн бұрын
People put a lot of effort into these cooling solutions, I just got a naked blower style fan mounted with stiff wire blowing in the general direction of the part and it works fine. I'm sure it could be improved but perfect is the enemy of good enough.
@santiagopostorivo
19 күн бұрын
But in some cases, you can tune it to work even better. If you have two fans or a dual duct of one fan where the airflow collides, you are wasting performance. He already showed that having a slight offset between the two improves the performance.
@SianaGearz
19 күн бұрын
Honestly you can do a LOT WORSE than the naked fan by trying to make it better. I have seen a lot of things that are worse.
@santiagopostorivo
19 күн бұрын
@@SianaGearz that is why you also test it in the real life. I have gotten better results from my designs that any other duct or the creality original duct. It all depends on what are you designing. You won't get the performance of high performance cooling systems, but you can make it better. Testing in real life is also important
@dolphin6782
19 күн бұрын
This is a really neat concept, but I do want to mention that there's a very high-pitched buzzing sound starting around 7:40 and is intermittent from then on that makes it hard to listen to for me as someone with sensitive hearing. Regardless, I appreciate the video and instructions provided. Thanks!
@DrLesterTheSmith
19 күн бұрын
This is sooooo cool. It looks like setting it up was a breeze. How did you catch wind of this program? Will you be testing all of the submitted designs using this setup or will you wind, errr, wind up only doing a few designs?
@EugenioNS
18 күн бұрын
such a great video and explanation
@dennisgignac5103
19 күн бұрын
Thank you again !!!
@mobiobione
19 күн бұрын
Right then! Off to do some Simulating!...
@ry7hym
19 күн бұрын
3 minutes ago! perfect video to watch during lunch right now
@95GTSpeedDemon
19 күн бұрын
Lunch? Funny thought as its 7am here lol
@beeopper
19 күн бұрын
@@95GTSpeedDemon 3pm here, funny how timezones work aye
@MStoica
8 күн бұрын
It's like Physics in school... I could see what's happening, I just couldn't understand what it means or why do I need to learn it :) Also, not sure what's with that duct piece, what is it for and do I have that in my printer somewhere? Or is it just in Prusas? (I think I heard Prusa at some point) But cool video, nonetheless. Looks like a lot of work has been put into it, like all your videos. And your videos are interesting, informative and useful (I can understand the other ones :D) +1 sub
@stefanNT_1008
19 күн бұрын
This project is shaping even better than expected! I am going to go on an limb here and ask if you can design an upgrade for the Ender V3 se, i am currently struggling with a single 5015 cooling solution, but I feel it can be much improved. Cheers!
@bwimtg
19 күн бұрын
what is the logic behind the volume needing to be inverted before importing into simscale? this seems odd to me.
@ericcmcgraw
18 күн бұрын
You're simulating the gas volume, not the solid nozzle geometry.
@JernD
19 күн бұрын
Awesome video!
@ahbushnell1
19 күн бұрын
I'm impressed.
@mariusj8542
19 күн бұрын
Perfect! - I have been fiddling with fusion to try to figure this out, but never succeeded.
@JeffBradway
19 күн бұрын
I was hoping to see some actually free simulation software. Some do exist, but not really with such smooth workflows as this, Ansys, or Fusion itself. I did get some hope when I saw the Simscale warning about numerical results not being available. For these simulations visual is probably just fine.
@nathansantos.n8
19 күн бұрын
what if we add a deflection flap on the silicon shroud on the hot end / nozzle to curve the airflow in the 'dead' zone might be helpful on overhangs that are oriented away from the ducts if the duct design is already blowing majority of the air in one direction
@Collateralcoffee
19 күн бұрын
Would be so nice to have the models for the Q1Pro...
@nickpunch9661
17 күн бұрын
Nice video. Im confused on how you re getting your numbers though
@kurisutofusan
10 күн бұрын
Why do you need to create a volume around the parts (the big cylinder)? Is it to limit the area of the simulation?
@ml1186
19 күн бұрын
Maybe you could just pump the water through the duct instread of air, somehow and place the whole thing in the water
@NATY1110
19 күн бұрын
Wait, Mike's not controlled by AI?
@fabianluethi03
19 күн бұрын
That's exactly what an AI would say...
@atharvabedarkar
12 күн бұрын
@@fabianluethi03ikr very sussy
@TheDarkrider551
19 күн бұрын
Someone needs to do a very simple coding tutorial for fluidx3d ive been waiting for about a year for a good one...
@trt969
19 күн бұрын
Man I love your videos! Holly shit! Keep it up!
@ThisisDD
19 күн бұрын
I'm interested to see how this looks on my designs. They work the way they are designed but I'm curious to see if my imagination is doing its job properly!
@IronMan-yg4qw
19 күн бұрын
awesome.
@Splarkszter
19 күн бұрын
Is it hardware simulation or cloud(another person's computer) simulation???
@nathan22211
15 күн бұрын
with Fusion it's either or I think. though there are some open source CFD software but the only one I know of is Linux only
@OutOfNameIdeas2
5 күн бұрын
Its broken. It doant detect the faxes on the mdoel and thinks its all just one single face
@FormerlyKnownAsAndrew
18 күн бұрын
MOAR DUCKS! 🦆
@chipcode5538
18 күн бұрын
The flow simulation is interesting, but at the end the goal is to get good cooling. Can you do a temperature simulation instead.
@SianaGearz
19 күн бұрын
A REAL HUMAN BEING? WHAT?
@TheOneAndOnlySatan
19 күн бұрын
Like the new ai
@Rollmops94
14 күн бұрын
9:22 Please remove this high frequency noise from the clips with the test-setup.
@AureliauGTaskas
19 күн бұрын
Yipeeee CFDDDD
@RhamonGB
19 күн бұрын
Please make that 360 design I proposed two or three vídeos ago, I really believe it would be a game changer
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