US Patent 7870893 Multichannel cooling system with magnetohydrodynamic pump

A cooling device includes a base having cells. A pipe is coupled to the base for each of the cells. The pipes include passages that carry fluid toward the cell and away from the cell. A magnetohydrodynamic pump system coupled to the pipe circulates an electrically conductive cooling fluid within the passages and the cell. An orifice may emits jets of fluid into the cells. A controller coupled to the cooling device may independently control flow rates in two or more cells of the cooling device. The controller may receive information from the temperature sensors on the base of the cooling device for use in controlling the flow rates in the cells.