Newbie questions

Hi

Lets say I have sequence of fluid dynamics.
When I'm doing it on a grid the final result consists
of sequence of red, green, blue and alpha values for every
grid cell and for every time tick, right ?

First issue:
Is it possible to export grid values of every frame
as a raw data (sequence of rgba bytes for first cell, then for second and so on) ? If not there should be some programs which are able to do it,
where I can find them ?

Second issue:
When I have 2 sequences of fluid dynamics is it possible to merge
them into one in the manner:
1st time tick:
color_of_first_sequence * 0.1 + color_of_second_sequence * 0.9
2nd time tick:
color_of_first_sequence * 0.2 + color_of_second_sequence * 0.8:
and so on

the final feeling should be that the first sequence is smoothly altered in the second