I saw a show about ferrofluid. It's a bunch of carefully engineered iron particles suspended in an oil. I thought it might conduct heat very well. The careful engineering was to keep the fluid flowing and not to sediment together.
What if we used a fine metal powder suspended in water. Something thermally conductive and corrosion resistant. Pumping becomes an issue, especially when going through the radiator.
Requirements:
· long, screw type pump
· flush internal fluid paths. no sharp edges
· waterblocks would be straight in one side, out the other
The radiator could be a wide flat tube with fins on either side with dual fans blowing through them.
The pipe has been cut away. There would also be plates covering the tops of the fins to direct airflow. Dual 120mm fans.