#0017 [Remix] X2 Delta P Duct [V2R2.2] for the MK3S(+) [New Flow Splitter]

prusaprinters

*** Thanks for checking out this model! ***If you appreciate what I'm doing, consider buying me a coffee, and check out my other models for something else you might like!**********Thanks to the awesome Delta P duct design by @teookie, I saw a significant increase in air cooling flow, so I did a remix and added 2x LEDs to let me see the extruder.That remix is here: https://www.prusaprinters.org/prints/133276-delta-p-for-mk3s-with-ledHowever with more usage, I noticed that the left duct did a better job cooling (stronger flow) than the right duct.  I tried to study it using a CFD tool to simulate it but the model kept throwing errors, so I ran a “real world” test instead to validate my observation by having it blow into a small container of water.  The pattern of the disturbed water surface would indicate biased or centered flow. In the pictures attached, it shows the flow to be left-biased, side-by-side to the same test for the X2 that shows a more balanced flow.*** Thanks for checking out this model!  If you appreciate what I'm doing, please consider buying me a coffee, and check out my other models!The X2 has the mods from my previous remix plus two others:Rotated flow splitter by 90° to help balance flow for left/right ducts - see rationale below.Added a location for a 3rd LED looking head-on at the extruder - more light is better since the extruder is always shrouded in the X-gantry's shadow.Why did this work better?Since blower fans produce an uneven flow profile (faster velocity further from the fan axis), splitting the ducts evenly similar to what @teookie did would bias the flow to the left duct. However,  @teookie tried to compensate for this by making the duct inlet on the right about 20% larger than the left.  This helped, but apparently it was not enough.  Since I rotated the split for the duct 90deg (and split the left/right evenly) it directed the same amount of air to both left/right ducts.Important Tip: Before you install this duct, please make a careful inspection of the inner duct walls and confirm that they are mostly free of stringing and overhang debris, both of which can have a significant impact on the duct's cooling performance.  Take steps to remove them as best you can, i.e. use a small torch to quickly remove stringing, and (bent) needle nose tweezers to remove any stubborn remnants.Note: You can find the model for the mounting bracket at @teookie's posting here. Installation instructions can also be found there. (Also attached both here for your convenience.) Updated Nov 6, 2022: Bear version added *** This is experimental.  I added per request from a few users.  I don't have a Bear configuration printer so I cannot verify if this works.  ***If interested, please try and give me your feedback to improve it.Updated Apr 4, 2022:  CFD ValidationI was finally able to run a computational fluid dynamic simulation to further study the flow.The results seem to further validate physical observation.  See pictures attached.Both flow volume and flow velocity appear to split evenly between the left and right ducts! Note: The max flow velocities in the CFD are a bit artificial, since I just used a simple 4.4CFM as volumetric flow input.  The main point is that the flows are split evenly.  I also found vortices forming at the duct outlet (flow going back into the duct at the exit), which will be a point for further optimization in the future (see pic).Animation of the X2 Duct Flow: Updated Apr 2, 2022: For those interested, the 24V LEDs I used are here (please note - affiliate link):https://amzn.to/3yhVjbeI made the holes for the LEDs a bit tight so you can use tweezers to push them in for a tight fit.  If they are too tight, you can use a 3mm drill bit to open them up – you'd want the final fit to be tight though.Wiring connector used (please note - affiliate link:) this provides quick disconnect for when/if you want to change the LEDs (after they start to get dim from long usage) or do other experimentation.https://amzn.to/3EZpGqKI also really like this transparent PC shown in my pics (please note - affiliate link):https://amzn.to/3L5OPnBUpdated Mar 31, 2022: Uploaded STEP files of both versions per request to be modified to fit other mounting configurations and/or printers.Updated Mar 27, 2022: By popular request…For those of you who prefer not to see the nozzle (joking):Added a version without the 3x LED features:Backed out all the changes related to the LEDsKept the enlarged square nut pocketKept the changes to increase the view port sizeIf you download the model or add to your collection, please click the LIKE button and rate the print with some STARS to help others find it as well.  Also please post a make as I would enjoy seeing you get good use out of it - it would make my day! :-DInstallation Instructions by @teookie, presented here only for your convenience:Note that these steps show @teookie's geometry (not my remixed X2 geometry)If you are still reading this, congratulations, you are serious about 3D printing! Happy printing!