• 3 Posts
  • 21 Comments
Joined 3 years ago
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Cake day: June 14th, 2023

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  • It’s getting a little frustrating that every company seems to want a few dollars per month from me. I get that it is expensive to maintain servers and keep programmers on staff to write and maintain the software, but I really hate being nagged by everything I own to buy more stuff.

    I also wonder how silly all of these subscriptions are. Especially for running. Do you need your Garmin or Polar watch to tell you what workout to do and when? Or should you follow a well established routine like Pfitz or Daniel’s running formula (or something more casual)? Do you need your data synced to the cloud and shared with Strava? Are the virtual “kudos” from others what’s keeping you motivated? Do you need your watch to tell you how that workout went compared to past workouts? Or should you figure out how to listen to your body and make that evaluation yourself?

    Maybe these subscriptions are useful for beginners who don’t know how to do the above. I’m just a little curmudgeonly and I really just need a watch that gives me distance and time.












  • I’ve been using SALOME to create parametric 3D geometry. My use case is to parameterize my geometry features and export to STL files that I use with OpenFOAM. SALOME is integrated with a couple of grid generators, and I really like it’s 2D/triangulation/STL integration with netgen. You can specify faces for refinement to a desired mesh size, so for example around complex features you can create a fine STL mesh and on simple shapes you can have a really coarse mesh.

    I’ve found the 3D modeling to be pretty straightforward, and SALOME usually does a pretty good job if you have to go back and modify previous features (something I’ve struggled with in FreeCAD).

    I’ve also used FreeCAD for mesh generation, and it works ok but I’ve found the triangulation leaves a lot to be desired for splitting up the mesh as needed for OpenFOAM boundaries.

    If you’re making STL files for 3D printing and you want a parametric CAD modeler for engineering parts, give it a try. If you want complex faces with artistic style, I would suggest Blender.


  • I would also recommend checking out SALOME for 3D modeling. I’ve been using the shaper toolbox to create geometry for fluid simulations and it’s worked well for me. The shaper toolbox is parametric (as opposed to SALOME’s geometry toolbox which is not).

    After you’ve created your geometry in shaper you switch to the mesh toolbox to create your stl file. I think there’s really good control over the triangle creations with SALOME. For example, you can specify edges and faces you want smaller triangles in (like around tight geometries, holes, etc). I’ve been able to get much higher quality stl files with this method than with freecad.

    SALOME is free and open source software.




  • I’m finally getting into both discworld and culture. I’ve read a number of other discworld books before, two of the night watch, mort, I think another I don’t recall right now. Now I’m reading The Colour or Magic. It’s enjoyable but I’m finding I’m going a little slower on it than the others.

    I also have the second culture book, Player of Games, ready to go when I finish the discworld book. I really liked how bonkers Consider Phlebas was (felt like a constant stream of chaos for the crew).




  • Recently I used SALOME for doing CAD. The Shaper work bench has parametric modeling with the sketches that you extrude or cut from. I found it powerful and easy enough to use that I replaced my freecad workflow with it. The big thing that sold me over freecad was the simplicity of creating more complex triangulations for stl export, and easily grouping faces for export into different files.

    I haven’t tried any complex surface creation, I wouldn’t be surprised if it falls short in that regard. I guess feature wise it probably doesn’t have everything freecad or fusion 360 has, but I found it works great for my needs. Great for 3d printing and geometry creation for CFD simulations.