Patent ID: 7516778

Claim:
A computer system, comprising: a heat source; and a heat sink operatively connected to the heat source, the heat sink comprising: a body having a plurality of fins, a pump assembly disposed on a top surface of the body opposite the heat source, a heat exchanger assembly disposed on a bottom surface of the body nearest to the heat source, a plurality of pipes that each individually extend from above the top surface of the body through the body to below the bottom surface of the body and each individually connects to the pump assembly and the heat exchanger assembly, a first channel partially disposed in each of the plurality of pipes and arranged to carry a fluid, a second channel partially disposed in each of the plurality of pipes and arranged to carry the fluid; wherein the pump assembly generates a radial magnetic field that controls a flow direction of the fluid in the first channel and the second channel, and the radial magnetic field causes the flow direction in the first channel to be opposite to the flow direction in the second channel.