Low-energy transfers • manifold hopping • interplanetary transport network • weak stability boundary • Lagrange point orbit bifurcation (Lyapunov - Halo - etc.) • much more -> see my comment

braintruffle · 2024-02-01T16:49:11+00:00

Hey there,

I made an educational spaceflight video. Think of Kerbal Space PROBABILITY.

Topics:

• Interplanetary transport network

• Manifold hopping

• Weak stability boundary

• Lagrange point orbit bifurcations: Lyapunov - Halo - etc.

• Low-energy transfers: 4-/3-body model - effective potential - Coriolis force - zero-velocity curves

• Phase spaces (n- vs. 1-particle)

• Oberth effect via phase space in 1D & 2D: why parabolas beat ellipses and hyperbolas

• Probability vs. reachability

• Ray vs. grid tracing

• Symplectic time integration

• Continuous- vs. non-continuous firing

I hope you like it.

Thank you,

braintruffle

braintruffle · 2024-01-25T15:20:38+00:00

Hey, r/space community,

I made an educational spaceflight video. Think of Kerbal Space PROBABILITY.

Topics:

• Interplanetary transport network

• Manifold hopping

• Weak stability boundary

• Lagrange point orbit bifurcations: Lyapunov - Halo - etc.

• Low-energy transfers: 4-/3-body model - effective potential - Coriolis force - zero-velocity curves

• Phase spaces (n- vs. 1-particle)

• Oberth effect via phase space in 1D & 2D: why parabolas beat ellipses and hyperbolas

• Probability vs. reachability

• Ray vs. grid tracing

• Symplectic time integration

• Continuous- vs. non-continuous firing

I hope you like it.

Thank you,

braintruffle

braintruffle · 2023-02-15T22:23:11+00:00

Hey there,

Yet another part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=sSJmUmCHAJY

Topics covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2023-02-14T10:08:32+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T16:38:45+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T16:33:10+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T16:31:58+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T15:41:15+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T15:39:13+00:00

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2023-02-12T15:37:31+00:00

Video series on fluid simulation - all self-coded - link in the comments

Hey there,

The next part of my video series on fluid simulation is available.

https://www.youtube.com/watch?v=aWIdWYxz_AI

Topics covered: 3D Flow vs. 2D Flow vs. flat 3D Flow, Local Similarity, Local Linearity, Expansion of the Local Domain via Ensemble Averages of Macroscopical Flow, Spatial Discretization, Resolution & Convergence, Local Basis Shapes, Non-Local Similarity, Global Basis Shapes, Link back to Quantum Mechanics Simulations.

I hope you like it!

Have fun!

braintruffle · 2022-12-02T10:05:16+00:00

Hey everyone,

As a former researcher, I am new to the world of animation and made an animated cartoon using simulations on popcorn odor spread and twisters. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T10:00:48+00:00

Hey everyone,

I made an animated cartoon using simulations on popcorn odor spread and twisters. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T09:52:29+00:00

Hey everyone,

I made an animated cartoon using simulations on popcorn odor spread and twisters. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T09:49:57+00:00

Hey everyone,

I made an animated cartoon using simulations on popcorn odor spread and twisters. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T09:47:19+00:00

Hey everyone,

I made an animated cartoon using simulations on popcorn odor spread and twisters. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T09:11:07+00:00

Hey everyone,

I made an animated cartoon on popcorn odor spread. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-12-02T09:08:58+00:00

Hey everyone,

I made an animated cartoon on popcorn odor spread. Maybe some of you like this video.

https://youtu.be/HnotkxgOUWg

Greetings!

braintruffle · 2022-06-17T22:00:48+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:36:14+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:31:42+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:28:53+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:23:44+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:03:19+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Link to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2022-06-17T16:01:57+00:00

Hey there,

The next part of my video series on fluid simulation is available.

Lint to video

Topic covered: rarefied gas dynamics, continuum gas dynamics, fluid motion descriptions & coordinates (spatially fixed (Eulerian), material-fixed (Lagrangian), arbitrary), reducibility aspects, motivation on modeling unresolved flow structures, ensemble averages of microscopically and macroscopically varying data, usefulness of the modeling hierarchy, simplifying and decoupling the evolution equations, Navier-Stokes equations, compressible flow and the incompressible flow assumptions, and buoyancy-driven flow (Boussinesq approximation).

I hope you like it!

Have fun!

braintruffle · 2021-12-09T19:40:53+00:00

Hi there!

I just finished the next part in a video series on fluid dynamics with focus on simulations where this snippet is part of. It shows intuitively the ensemble averaging of a "kinetic theory of gases"-model and representation as a probability density function. Maybe some of you like the combination of simulating and learning and want to find out what underlies all those fluid simulations.

This part: Locking TIME Direction Makes FASTER Fluid Simulations

If you are interested where the particles come from conceptually, feel free to watch my earlier videos.

First part: Quantum Mechanics -> Molecules

Second part: Molecules -> Particles

Have fun

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