Electrohydrodynamic heat sink

1. An electrohydrodynamics heat sink, comprising:

a base electrode receiving heat from a heat source to be dissipated, the base electrode having a shape that converges with a cavity wherein a fluid is placed during use, and

a corona electrode arranged in the cavity of the base electrode, the corona electrode connected to an electric power source (P.S) in order to ionise the fluid of the base electrode and generate an ion wind (w) from the corona electrode to the base electrode, so as to generate a laminar current of the fluid in order to discharge the heat from the cavity,

wherein the corona electrode is separated from the base electrode at a minimum distance (G) of between 1 and 5 mm, and

wherein the cavity has a bottom and side walls arranged in continuity with the bottom, and wherein the side walls are separated from each other at a distance which is at least 5 times the minimum distance (G).

2. The electrohydrodynamic heat sink according to claim 1 , wherein the cavity is U-shaped with arched edges in the junction between the bottom and the side walls.

3. The electrohydrodynamic heat sink according to claim 1 , wherein the fluid of the cavity of the base electrode is a dielectric fluid.

4. The electrohydrodynamic heat sink according to claim 3 , wherein the dielectric fluid is water or air.

5. The electrohydrodynamic heat sink according to claim 4 , wherein the air is at atmospheric pressure, the corona electrode being electrically powered between a minimum value comprised between 500-2000 volts and a maximum value comprised between 3000-7000 volts.

6. The electrohydrodynamic heat sink according to claim 5 , wherein the corona electrode has a tip with a radius of between 5 and 100 microns.

7. The electrohydrodynamic heat sink according to claim 1 , wherein the corona electrode has an elongated shape which extends parallel to the bottom of the cavity of the base electrode.

8. The electrohydrodynamic heat sink according to claim 1 , further comprising a channel arranged between the side walls and corona electrode.

9. The electrohydrodynamic heat sink according to claim 8 , wherein the channel consists of two walls, each wall arranged on each side of the corona electrode which extend in a direction perpendicular to the bottom of the cavity.

10. The electrohydrodynamic heat sink according to claim 1 , wherein the base electrode has two or more cavities, wherein a single corona electrode is arranged in each of the cavities.