once i watched a documental in which they explained they couldnt use centrifugal pumps to pump blood since the accelerations destroyed the sensitive red cells
what they explained in the documentla they did was build a special pump shape in the exact spiral shape such that though the red cells were propelled while they felt 0 g
now i understand how they did it
imagine you have a 2 m tube rotating an an w of 1 and you put a 1 kg red cell inside such as it starts on 1 m radius and ends propelled by centrifugal force with two m radius leaving the tube faster than it started
seems here the red cell wont feel the normal aceleration
the problem is it will feel a strong tangnetial acleration since it started with an speed of 1 when the radius was 1 m and an speed of 2 when the raidius is two m since the tube has a constant w of 1
but the key was explained in the documental the blood pump shaped an spiral
thats the trick instead of using a staright tube use an spiral tube in the exact shape in proportion with the w such that the tangential velocity is constant and therefore theres no tangential acceleration as theres neither normal one
so the red cells are propelled by an artificial gravity identically as the natural gravity
they acelerate in the spiral pump propelled by centrifugal force but as with natural gravity they actually feel on free fall at 0 g
rarely they show educative things on tv instead of sex and violence