Here are some videos from my youtube channel. They will be either my computer simulations or Experiments by hand
DLA is a well studied aggregation model. There are many ways one can define rules. Inthis model I fixed one seed particle at centre of 500 x 500 square lattice with periodic boundary and sent random walkers from randomly chosen boundary points one by one. whenever the first walker meets the seed, it sticks with it. then we send the next walker. colours are given from a gradient colour panel and picked based on the starting time. first walker was green, and final yellow, like that.
I believe that we should go behind patters in nature, because they are a direct manifestation of the natural laws that rules our lives. Nature's rules that we are seeking could be beneath them
Read this article or see kelvin problem
you may be interested to have a look at BubbleFest organised at trinity college
1. Point particles
2. Fractal clusters
3. Spherical clusters
See the Flash at 12 th second!! guess what happened?
why does it get collected at the middle?
https://physics.stackexchange.com/questions/3244/vortex-in-liquid-collects-particles-in-center
Read about Tealeaf paradox:
Experiment done in collaboration with my cousins
*Do try this at home !, Don't cut too much like I have done just try to get the outer layer nice
This is a hopper made from soap box. we didn't see any jamming occuring in this small set up(this sand was very nice collected from beach, and also tried to wash out salt, dried). But you can observe jamming when there is enough mass on the top. or if the grains were little more big, anyway feel the flow ! HOW beautiful!!. Flow of granular materials in setups like hopper are of great research interest Due to applications in industry where they deal with processing and transportation of cereals.
I have been trying to reproduce the spontaneous stratification that I had seen in sugar and tea using a computer model. I have seen some works where they could achieve this by taking particles of different sizes. But I think we I can get it even with similar looking particles but differed by some probabilities(tuning probabilities) which I assign to stay, to flow, etc.. this video is just a sample, black and yellow particles are not flowing similar way, I don't want to mention about the rules now, I will upload this in detail soon
on the floor
2. On top of pile
3. In a 2D like setup