LT72884
LT72884
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Mesh errors that can happen with CFD WB Ondsel and Freecad
There is a proper order that things need to be done sometimes and if its not done in that order, things will break. I show a quick example in this video of what happens when you try and setup the BC's and initial conditions first rather than setting up the meshing and volume refinements
มุมมอง: 66

วีดีโอ

Using Ondsel Engineering Suite (opensource free) For an Open Far Field CFD Simulation
มุมมอง 207หลายเดือนก่อน
In this video i discuss some rule of thumbs for an open far field test for a aerodynamic simulation of a 5 meter (16 foot) missile. The advantage of using open far field is that if you have to rotate the rocket or the direction of the fluid flow using the standard inlet/oultet, you have to remesh every time, with far field, you do not. Fyi, 3 is a factor of 6...
Using pydatview and excel to make force graphs from openfoam data
มุมมอง 842 หลายเดือนก่อน
If Ondsel or freecad closes on you or you forget to save the force graph images, here is a quick and dirty way of getting the data
Using OpenROCKET to evaluate a Level 1 High Powered Rocket
มุมมอง 902 หลายเดือนก่อน
The title says it all
Part 5 Ondsel (FREE and OPENSOURCE) High Speed CFD for rockets
มุมมอง 2992 หลายเดือนก่อน
In this video demo i show how to use the CFDOF workbench in Ondsel Engineering Suite ,a FREE and OPENSOURCE parametric modeling program, to do high mach number calculations for rockets. I also go over some of the hand calcs. Here is the link to my paper as well as the TR-11 tech report. I high sugesst to read the entire TR-11 tech report, especially the apendix where it goes through a full exam...
Part 4 Force calculations CFDOF Ondsel Engineering Suite (FREE and OPENSOURCE)
มุมมอง 2102 หลายเดือนก่อน
This video i show how to do a more advanced cfd in Ondsel , a FREE and OPENSOURCE parametric modeling program, using a volume and surface refinement as well as adding calculations for finding the forces. Link to the TR-11 www.oldrocketplans.com/pubs/Estes/estTR-11/TR-11.pdf
Part 3 Using Paraview ( FREE and OPENSOURCE) for CFD Results from Ondsel and or FreeCAD
มุมมอง 2293 หลายเดือนก่อน
BASIC rundown on using paraview, a free and opensource post processing software, to VIEW the results of CFD from Ondsel, another free and opensource parametric modeler. No calculations were performed. That will be another video
Part 2 CFDOF Workbench Ondsel (FREE and OPENSOURCE) and Freecad
มุมมอง 5103 หลายเดือนก่อน
A quick run down for beginners on how to use the CFDOF workbench in Ondsel ( Ondsel, a FREE and OPENSOURCE parametric modeling program) and freecad. Instead of using my setting for the physics and intial fields. Just set the physics to steady and rans. Then for the intial fields, set both velocity and pressure to potential flow. This will run a simulation in 30 seconds or so with 8 cores and 32...
Part 1 Using Ondsel (FREE and OPENSOURCE) Engineering Suite to Create a Rocket for CFD
มุมมอง 4663 หลายเดือนก่อน
I used the rocket workbench in Ondsel, a FREE and OPENSOURCE parametric modeling program, to make a 1 meter rocket for cfd analysis. This is the first episode of a multipart series on CFD in Ondsel. You can put a bulkhead in the rear before fusing so that you have a sealed rocket. Its up to you :)
Cnc Foot in Part Workbench
มุมมอง 953 หลายเดือนก่อน
Making my favorite part in Ondsel but using the part workbench and direct modeling. I modeld this foot years ago in Sketchup Pro but no wi have done it in Ondsel. I would also like to thank OffsetCad for his tutorials and advice as well.
Using the fillet tool on a curved surface
มุมมอง 1073 หลายเดือนก่อน
Using the fillet tool on a curved surface
Quick and Dirty Lofting
มุมมอง 753 หลายเดือนก่อน
This video i show a quick way of lofting the curved shape in the previous video.
Lofting to create curved shapes
มุมมอง 2773 หลายเดือนก่อน
In this video, we use the loft tool to create a curved object. We also cover datum planes, offset sketches, and mirroring elements within a sketch. I am still learning as well so please bear with me as I transition from one software to the other ;) Credit goes to V1 engineering for the MPCNC. Thanks Offsetcad and OficineRobotica for showing how to create the same part in different ways
Part 2 - Screwdriver
มุมมอง 3983 หลายเดือนก่อน
In this video we finish up the screwdriver using a few new tools.
Ondsel Engineering Suite Screwdriver Tutorial
มุมมอง 2.1K3 หลายเดือนก่อน
Using the new Ondsel parametric modeler to create a screwdriver. Here is the drawing drive.google.com/file/d/1AK39w6-EFtijde7qkA8tBdTtExdvjI_T/view?usp=sharing
my graduation march through the school
มุมมอง 1384 หลายเดือนก่อน
my graduation march through the school
Basic part from solidworks 2023 made in Ondsel Engineering Suite.
มุมมอง 4.9K5 หลายเดือนก่อน
Basic part from solidworks 2023 made in Ondsel Engineering Suite.
A Simple Space Dynamics Problem
มุมมอง 156 หลายเดือนก่อน
A Simple Space Dynamics Problem
Basic Force Analysis of Airfoils
มุมมอง 427 หลายเดือนก่อน
Basic Force Analysis of Airfoils
Using OpenFAST with MLife for Fatigue Analysis
มุมมอง 6747 หลายเดือนก่อน
Using OpenFAST with MLife for Fatigue Analysis
MLife - Some options i missed in the last video
มุมมอง 897 หลายเดือนก่อน
MLife - Some options i missed in the last video
FEA convergence analysis
มุมมอง 677 หลายเดือนก่อน
FEA convergence analysis
FreeCAD - Modeling a wind turbine blade from airfoil data
มุมมอง 5768 หลายเดือนก่อน
FreeCAD - Modeling a wind turbine blade from airfoil data
BASIC FEA in Freecad
มุมมอง 3K8 หลายเดือนก่อน
BASIC FEA in Freecad
fea with sketchup
มุมมอง 1789 หลายเดือนก่อน
fea with sketchup
IREC presentation for committee
มุมมอง 559 หลายเดือนก่อน
IREC presentation for committee
More Detailed Version of Finding Coefficient of Drag From Quadratic Drag
มุมมอง 1059 หลายเดือนก่อน
More Detailed Version of Finding Coefficient of Drag From Quadratic Drag
Finding Coefficient of Drag from Quadratic Drag Equation - Less Detailed Version
มุมมอง 489 หลายเดือนก่อน
Finding Coefficient of Drag from Quadratic Drag Equation - Less Detailed Version
XFLR airfoil analysis for fins and blades
มุมมอง 26610 หลายเดือนก่อน
XFLR airfoil analysis for fins and blades
How To Make an Airfoil in Sketchup
มุมมอง 22910 หลายเดือนก่อน
How To Make an Airfoil in Sketchup

ความคิดเห็น

  • @lynrobhome6525
    @lynrobhome6525 17 ชั่วโมงที่ผ่านมา

    My start page be lookin different help?

  • @misc_channels-po6rh
    @misc_channels-po6rh 5 วันที่ผ่านมา

    Some of us are trying to enjoy the beautiful music, please don't talk over it.

  • @lolopit
    @lolopit 2 หลายเดือนก่อน

    I was looking for how to apply actual colours to the object other than random one, and boy oh boy I would have never thought to try doing it on the last action, thanks for that!

  • @Vindix007
    @Vindix007 2 หลายเดือนก่อน

    Great app, but a bit buggy too.

  • @bby6240
    @bby6240 3 หลายเดือนก่อน

    I have gone through your open fast video. It was fabulous and respect your time invest here. I would like to connect with you to gain more knowledge on that. Is there any way I can connect, it would be great for me. Thank you😊

  • @motassemslaibieldirani6810
    @motassemslaibieldirani6810 4 หลายเดือนก่อน

    hello, can you share the file to your blade?

  • @serhatkukanaz4616
    @serhatkukanaz4616 4 หลายเดือนก่อน

    Hi sir i am a student in sakarya university (mechanical engineering) in turkey and we should find Cd of a 1/20 scale down truck model for our last year graduation project and we really need help. How can we find Cd with wind tunnel or ansys. First we are gonna find Cd with wind tunnel than with ansys

  • @bonniejeanblack1232
    @bonniejeanblack1232 4 หลายเดือนก่อน

    There is a Lockhart building!! And they are playing A Scottish song

  • @veith987
    @veith987 5 หลายเดือนก่อน

    hi, are you planing on making a video of how the linearization works, e.g. to calculate the eigenfrequencies and campbell diagramm? that would be great!

  • @majidebrahimi8890
    @majidebrahimi8890 5 หลายเดือนก่อน

    Hello there, do you know the relation between the Weibull distribution of wind and long-term fatigue assessment?

    • @LT72884
      @LT72884 5 หลายเดือนก่อน

      not to much. When it comes to wind and long term fatigue, usually a Reyliegh ( i think i spelled it wrong) distribution is used instead. PSUWind on youtube has a few videos showing this, but im not sure if they relate it to fatigue.

  • @francisdaoust5862
    @francisdaoust5862 5 หลายเดือนก่อน

    Wow, really cool. I used solidword in the past, fusion360 but I was looking for something free and offline. This software look to be great❤. I m curious if you can show how to draw a propeller with the airfoil add on😊

    • @LT72884
      @LT72884 5 หลายเดือนก่อน

      i do not know how to sue that add on, However, i do have a video showing how to make a wind turbine blade which you could follow the same steps to make a propeller. I also think MangoJelly creator on youtube did a video of making a propeller in freecad (Ondsel is based off of freecad)

  • @althomas4784
    @althomas4784 5 หลายเดือนก่อน

    Good stuff..... from Thomas Telecommunication

  • @JMTechnicalCornerexploration
    @JMTechnicalCornerexploration 6 หลายเดือนก่อน

    Hi Sir, I have followed your video, but while running it doesn't work. Could you please give me the guidelines?

    • @LT72884
      @LT72884 5 หลายเดือนก่อน

      what doesnt work? Here is a link to the current manual i wrote drive.google.com/file/d/1H9_JI6ufgTip6q41Mrd9J1Nl3_UoIzD-/view?usp=sharing

  • @JMTechnicalCornerexploration
    @JMTechnicalCornerexploration 6 หลายเดือนก่อน

    I want to determine fatigue damage and fatigue life of mooring line by MLife? If it is possible can you give me any reference?

  • @JMTechnicalCornerexploration
    @JMTechnicalCornerexploration 6 หลายเดือนก่อน

    Hi sir, Is it possible to do fatigue analysis of mooring line using OpenFAST and MLife?

  • @JMTechnicalCornerexploration
    @JMTechnicalCornerexploration 6 หลายเดือนก่อน

    Hi Sir, Can I get your email address?

  • @alexandermckenzie5077
    @alexandermckenzie5077 7 หลายเดือนก่อน

    How are you liking FreeCAD so far?

    • @ajarivas72
      @ajarivas72 7 หลายเดือนก่อน

      Very much

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      as the author of this video, i really do like freecad. I came from solidowrks. However, my favorite software is sketchup pro BUT it cant do fea. PrePoMax can do fea on STL files though and so can intact.design website. Sketchup works the same way my brain does, just wish it was a solid modeler.

    • @ajarivas72
      @ajarivas72 6 หลายเดือนก่อน

      @@LT72884 Very nice video. Watching your presentation is a very good guide to do FEA in FreeCAD .

  • @johnanderson4638
    @johnanderson4638 7 หลายเดือนก่อน

    Good practice to check at every step and refer back to the real world when possible. Nice,

    • @ajarivas72
      @ajarivas72 7 หลายเดือนก่อน

      What is the name of the software to do crack analysis ?

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      @@ajarivas72 calculiX solver will do this. Here is a link to the users guide. Look at the table of contents and look for 6.9.25 www.dhondt.de/ccx_2.19.pdf

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      for sure. Thats how i like to run things. I know it takes time and some people and supervisors dont like that, but when i remind them of the oath they took to ensure the safety of all, they back down haha. I do my best to triple check everything

  • @pmw040242
    @pmw040242 7 หลายเดือนก่อน

    Hello, we are a team that operates Formula Student team in Korea. When we conduct the aero dynamics test, we conduct the experiment with only the aero parts without the actual car test. However, this time, we want to verify by logging the actual driving situation. The contents of the accelerator sheet are interesting, so could you allow us to receive the sheet and modify it? I want to develop it further.

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      docs.google.com/spreadsheets/d/1H3MC8Wd9fAD9PCz7CfUQge3LYPTa0L3E/edit?usp=sharing&ouid=102174349869122990520&rtpof=true&sd=true

  •  7 หลายเดือนก่อน

    Truly amazing. Thanks!

    • @ajarivas72
      @ajarivas72 7 หลายเดือนก่อน

      You will be more amazed when using FreeCAD in batch mode with the command freecadcmd

    •  7 หลายเดือนก่อน

      @@ajarivas72Thank you for the tip. I'll try it.

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      Thanks, i am glad you like my videos on this subject. FEA is not always easy haha

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      @@ajarivas72 Have not used this method yet

  • @hermanvandenbroek9152
    @hermanvandenbroek9152 9 หลายเดือนก่อน

    I saw the link on the SketchUp forum and had to see it. Thanks for bringing this to my attention, love it!

  • @althomas4784
    @althomas4784 9 หลายเดือนก่อน

    Good stuff

  • @hillardtoddy1320
    @hillardtoddy1320 9 หลายเดือนก่อน

    *Promosm*

  • @althomas4784
    @althomas4784 ปีที่แล้ว

    Big Al from Draper Utah....Very Good, ..... Good information....

  • @LT72884
    @LT72884 ปีที่แล้ว

    FYI, when i say R squared is not really important... please ignore tha haha. R squared is how accurate your data is.. 0.99 means 99%

  • @erikm5753
    @erikm5753 ปีที่แล้ว

    Thanks. Curious how this would change IRL with wind included. I assume this vid is a 0 wind day. Let's say the wind is parallel, reduce or increase Fdrag or Dragx (N) by...? Do we simply include Vwind to the Fd...CdApV^2Vwind? Vwind could be + or -? Of course the results are real life so additional wind is included in your process, just not noted. But I was seeking the correct Fd that includes Vwind...

    • @LT72884
      @LT72884 ปีที่แล้ว

      sorry for very late reply. the wind was close to 0 this day. However, if there is a wind, i would do 4 trials with a tail wind and a head wind, just to see how much it effects coasting velocity. If it doesnt really effect it, then i not adding it would be ok.

  • @althomas4784
    @althomas4784 ปีที่แล้ว

    Good stuff ....

  • @SpeedBump613
    @SpeedBump613 ปีที่แล้ว

    Thanks for the attempt, but 10 secs in and shut it off. Its a tutorial, not a concert. Bag the music. Moving on. GL

    • @LT72884
      @LT72884 5 หลายเดือนก่อน

      i agree. For whatever reason, when i play the video on my pc it is fine, but as soon as it is uploaded to youtube, the music is BLARING... I will try and redo it.

  • @1edwinalmeida
    @1edwinalmeida ปีที่แล้ว

    I suscribed.

  • @1edwinalmeida
    @1edwinalmeida ปีที่แล้ว

    Amazing, great inspiration for me, thanks!

  • @balacv02
    @balacv02 2 ปีที่แล้ว

    Who adds music to a good tutorial?

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      i know i know haha. i complain about the same thing and then i go and do it haha

  • @bobd.
    @bobd. 2 ปีที่แล้ว

    01:30 Problem with the current (on 23SEP2022) version of the Shapes extension is it does NOT include Sphere and Helix in the list of shapes one can draw. The previous two commenters are correct in that the music makes it difficult to understand the narration. I tried to follow to the end but I couldn't take the music, had to quit before it drove me nuts.

    • @LT72884
      @LT72884 6 หลายเดือนก่อน

      thats strange, i just checked the original file and there is no music. Something went crazy when it uploaded to you tube. It used to not do this.. sorry guys

  • @terrylewis5786
    @terrylewis5786 2 ปีที่แล้ว

    @LT72884 Nice work. Do you know an easy way to may NPT threads? They have a slight tapered thread.

  • @althomas4784
    @althomas4784 2 ปีที่แล้ว

    I understood everything. Big Al Draper Utah

  • @drewporter8959
    @drewporter8959 2 ปีที่แล้ว

    I also think it is important to mention that there is variability in the quality of part that can be printed. Different operators/printers may not have the same quality which will affect the surface finish, the pressure holding ability, the water permeability.

  • @drewporter8959
    @drewporter8959 2 ปีที่แล้ว

    I was wondering if you have a source for your statement that viruses are only transmitted though cells, and are not present outside of a cell, say though saliva or nasal secretions. That goes against everything I learned in school about viral transmission. Love the work you are doing and just want to make sure the most accurate information is conveyed on this important topic.

    • @LT72884
      @LT72884 2 ปีที่แล้ว

      they are present in saliva and nasal secretions as you say, known as the droplet transmission method. I was trying to say that viruses need a host cell in order to replicate, and if they pass through the respiratory tract, they will be encapsulated in some sort of cell or something much larger than themselves. I mention this at 22:57. I use the word "host cell" as the wording. Meaning that the virus is encapsulated in some sort of other thing. I have to re-do all these presentations anyway since the project is mostly done, new information is now needed to be added haha Its so hard to get everything in that is needed haha. so much information and so very little time or people lose interest hahaha thanks for watching and bringing this up to my attention. I will use a different terminology to better reflect

  • @justcheckinm8
    @justcheckinm8 2 ปีที่แล้ว

    Something to note if people are going to turn the models into physical bolts (3D printing them) is that the arcs are not very circular. The whole circle is 24 segments by default, and that equates to a 15deg angle change between segments. If you made a nut to fit the thread without suitable clearance (by subtracting a copy of the bolt from another solid), it would lock at 1/24th rotation, or not even be able to be started. Subtracting a 'thing' from another 'thing' in 3d modelling is like cutting it with a blade that is 0mm thick. The cut faces actually occupy the same space. Having a big clearance is fine if only using it for display purposes or a bit of fun. For anyone wanting to print their 3D model, I would recommend changing the segment count from the standard 24 to much higher and equally dividable by 360. I've done it at 144 segments (36*4) which makes for a 2.5deg angle change in each segment. The computer grunts a bit, but the model is a lot smoother when finally produced. You also have to remember that any other arc that you want to use for shaping the bolt, such as chamfers and tapers should also be set to the same segment count. It will help prevent really tiny holes appearing after solids operations which leaves you with "not a solid"

  • @JMLjml-dm7dk
    @JMLjml-dm7dk 2 ปีที่แล้ว

    Garbage

  • @SlicePrintRoleplay
    @SlicePrintRoleplay 2 ปีที่แล้ว

    A great explanation/demonstration of a very cool scientific principle. Well done!

  • @akaTelo
    @akaTelo 2 ปีที่แล้ว

    This is a great series! I got here from your in-depth comments about food safe 3d printing on a video from the Prusa channel a while back. Looking forward to the results and the next parts of the presentation.

  • @xRoSkii
    @xRoSkii 3 ปีที่แล้ว

    How to make inner threads would be awesome to see!

    • @tvideo1189
      @tvideo1189 3 ปีที่แล้ว

      Make the outer male threads as shown and subtract it from the solid you want threaded.

    • @LT72884
      @LT72884 2 ปีที่แล้ว

      the inner threads are created. that is the second inside spiral. however, if you want them flat like the actual ansi standard, there is a way to do it. I will have to see if i can find the video of me making them. However, with 3d printing, there is no need for that flat section, its 1/H which ends up being 0.125mm for this particular thread. Larger threads, you could add them in:) Here is the video where i show how to do inner threads th-cam.com/video/uMmIEQmU0Bg/w-d-xo.html

    • @xRoSkii
      @xRoSkii 2 ปีที่แล้ว

      @@LT72884 Thanks bunches!

  • @rexgoodheart3471
    @rexgoodheart3471 3 ปีที่แล้ว

    My only problem with your video is where you pull down the round cylinder part of the bolt (i.e. the shaft beneath the head) onto the first thread. When 3d printing won't that create a problem with your slicer software in that there are some interior planes? I'm wondering why you just didn't leave that part alone since there was no break between the cylinder and the threads?

    • @LT72884
      @LT72884 2 ปีที่แล้ว

      you could completely leave it and it will be fine:) as long as it is a solid at the end, moving it down did not cause issues with the slicer at the moment. You are right, there is s certain threshhold of where to place that shank.

  • @rexgoodheart3471
    @rexgoodheart3471 3 ปีที่แล้ว

    I'm not sure I'll ever need to print an ANSI compliant bolt on my 3D printer, but your video is interesting and great, nonetheless. Thanks!

  • @curtisw5873
    @curtisw5873 3 ปีที่แล้ว

    Can you reupload without the music?

  • @Stupid1996Boy
    @Stupid1996Boy 3 ปีที่แล้ว

    Wanted to truly thank you, great tutorial, got one set up in no time thanks to you.

  • @bbr1808
    @bbr1808 4 ปีที่แล้ว

    I can`t follow a long, because of the music

    • @LT72884
      @LT72884 3 ปีที่แล้ว

      yes i can. On my pc, the actual video is louder than the music. let me fix this and redo it. that is sooo anoying to hear that music hahaha

  • @Drinnan
    @Drinnan 4 ปีที่แล้ว

    Thanks for this. I viewed a video several months ago on how to make threads and it looks the exact same method as this but when pulling the threads in to the centre, it didn't work right at all. I'll have to try and find the older video to see if you done something that he didn't or if sketchup web has changed to allow this since I last tried

    • @LT72884
      @LT72884 4 ปีที่แล้ว

      Its all in how you use the scale tool. You have to make sure that you use ctrl so that it is a uniform scale, and not just a scale on one side of the bolt. Remember that the scale tool is a percentage. Thank you for watching and im sorry for not replying sooner.

    • @LT72884
      @LT72884 4 ปีที่แล้ว

      I have done it a few times in the web version as well to make sure it works. as of March and April, it worked. i will test again though.

  • @jacylight1610
    @jacylight1610 4 ปีที่แล้ว

    Your video helped alot

  • @LT72884
    @LT72884 5 ปีที่แล้ว

    The chasis that surounds the psu is grounded. I have tested it by putting my black probe on the ground prong of the outlet of the psu, and the red probe on the screw. Sure enough, it shows continuity.

  • @LT72884
    @LT72884 6 ปีที่แล้ว

    here is the link to the powerpoint: s000.tinyupload.com/index.php?file_id=86687674535005258637