Mini-spiral as source of material for Sgr A* in bright state
  The question of the origin of the gas supplying the accretion process is
pertinent especially in the context of enhanced activity of Galactic Center
during the past few hundred years, seen now as echo from the surrounding
molecular clouds, and the currently observed new cloud approaching Sgr A*. We
discuss the so-called Galactic Center mini-spiral as a possible source of
material feeding the supermassive black hole on a 0.1 parsec scale. The
collisions between individual clumps reduce their angular momentum. and set
some of the clumps on a plunging trajectory. We conclude that the amount of
material contained in the mini-spiral is sufficient to sustain the luminosity
of Sgr A* at the required level. The accretion episodes of relatively dense gas
from the mini-spiral passing through a transient ring mode at $\sim 10^4$ Rg
provide a viable scenario for the bright phase of Galactic Center.
