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An object in a fluid

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TomW
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Gear: TW Surfboards 5-0
TW Surfboards hydrofoil board 90,105,110cm
Moses Fluente 550/590 + 330/325 and 633 se
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Re: An object in a fluid

Postby TomW » Wed Jun 05, 2019 8:20 pm

Your six year old must be a genius

tkaraszewski
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Re: An object in a fluid

Postby tkaraszewski » Sun Jun 09, 2019 7:10 pm

fluidity wrote:
Wed Jun 05, 2019 6:32 pm
Ok, answering my own question:
https://openfoam.org/ (the engine)
https://sim-flow.com/ (the cockpit to drive it)

Just ordered the first parts for a CNC table I'll build soon.
Steppersonline for my stepper motors, drivers, interface board and water cooled spindlemotor.
Robotdig for splined pulleys, timing belts, linear bearings.
If you get this working, please let me know how! So far all of my experiments with CFD have resulted in failures to generate meshes from models or failures for simulations to converge. It’s an enormously frustrating learning curve.

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rynhardt
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Re: An object in a fluid

Postby rynhardt » Sun Jun 09, 2019 7:23 pm

TomW wrote:
Wed Jun 05, 2019 8:20 pm
Your six year old must be a genius
Well, he likes the pictures. :lol:

fluidity
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Local Beach: Ngati Toa, Plimmerton, Titahi Bay, Waikanae, Petone, Seatoun, Lyall Bay, Eastbourne, Lake Wairarapa
Style: Wave, jump
Gear: Old Flexfoil 9, Switch Element V4 11m, Ocean Rodeo Prodigy 7m 2014, Nitro14m v6, Nitro9m v6 12mSwitch Legacy2
DIY CAD ultra-concave wave twintips 1500 and 130mm with my own fin designs. Easy upwind, awesome carving.
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Re: An object in a fluid

Postby fluidity » Mon Jul 01, 2019 12:05 pm

tkaraszewski wrote:
Sun Jun 09, 2019 7:10 pm
fluidity wrote:
Wed Jun 05, 2019 6:32 pm
Ok, answering my own question:
https://openfoam.org/ (the engine)
https://sim-flow.com/ (the cockpit to drive it)

Just ordered the first parts for a CNC table I'll build soon.
Steppersonline for my stepper motors, drivers, interface board and water cooled spindlemotor.
Robotdig for splined pulleys, timing belts, linear bearings.
If you get this working, please let me know how! So far all of my experiments with CFD have resulted in failures to generate meshes from models or failures for simulations to converge. It’s an enormously frustrating learning curve.
I haven't progressed further with investigating the simulation tools yet.
Spindle motor, stepper motors and stepper motor controllers arrived and I have some 1800mm long rail and sliders on it's way. Still working out the y and z axis parts.
Planning for around 80mm z travel, 600mm y travel and 1600mm x travel.
Regarding the simulation and broken meshes, what do you do your CAD in?
I've heard that sketchup doesn't give the best meshes.
I use OPENSCAD which is a descriptive programmer's cad, it's easy to muck things up, you have to explicitly join objects, not just overlay them in 3D space. Once you understand the rules of the tools, it's easy to get good meshes. And if you mathematically describe complete surfaces, direction of facet coordinates affects which surface is inside, which is outside. Not sure about Klein bottles though!


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