evgenykurbatov / kp23-turb-conv-ppd Goto Github PK

I didn't try your project myself. But how about a real life test regarding the
motion of angular momentum in a plate of star pasta soup?
Angular momentum transport by heat and turbulence can be incredibly efficient
and happens a lot faster than e.g. heat conduction and there is an pretty nice
and simple test of this.
Just get take a plate of star pasta soup and stir the center of that with a spoon.
After a very short time the outer regions are rotating faster then the center!
This happens even faster in case of a hot soup which has a much lower viscosity.
If viscosity would be important thing then the center wouldn't ever rotate slower
than the outer regions at all and the angular momentum transport would be also
slower in case of a higher temperature. It's not the viscosity that counts but
the Brownian motion of the water molecules is responsible for the transport
of the angular momentum.
On all particles which moving in rotation direction faster than the surrounding
ones act higher centrifugal forces which are driving them to the outer regions of the
plate. If particles move in opposite direction then the centrifugal forces are lowering
and the particles move towards the center.
It's the most likely reason of differential rotation of the sun and the gas planets as well.
Does your model already care the centrifugal forces on the particles because of the
temperature and the interaction of the inner and outer particles for forwarding
angular momentum and energy to the outer regions?
If not then you should add this because it's the important thing. I know that it's
hard to do calculate because you have to care the movement and interaction of
random moving particles for that.
Light particles like hydrogen molecules are moving faster at the same temperature.
For this they should be much more efficient than other stuff or even rocks if it
comes to the transport of angular momentum towards the outer regions of an
accretion disk. This also drives the light hydrogen particles faster to the center of
an accretion disk or a galaxy. What else are the young stars in the center of our
galaxy come from? Of course this is just a guess.
But first of all I hope you enjoy the playing with your soup (or a some water) for
watching the transport of angular momentum inside your plate for discovering the
science of a star pasta soup and it's hidden relation to the stars and planets above us!
😉