NOVELTY - The heat sink has thermally conductive base member which is mounted on or be placed in thermal communication with a heat source (12). A heat sink module has bottom surface and mounted on a top surface of the thermally conductive base member. An inlet chamber is formed within the heat sink module, and an outlet chamber has open portion enclosed by the top surface. A dividing member is disposed between the inlet chamber and outlet chamber, and comprised of orifice formed in the dividing member and configured to deliver jet streams of coolant (50).    USE - Heat sink for receiving and discharging flow of pumped coolant. Uses include but are not limited to densely packed servers in data centers, computers in distributed computing clusters, medical imaging devices, electronic communications equipment in cellular networks, solar panels, high-power diode laser arrays, and electric vehicle components such as battery packs, electric motors, and power electronics.    ADVANTAGE - Reduces the risk of overheating of critical components, and maintains or improves the device performance since the size of the electronic device housing can be reduced. Enhances the performance and overall efficiency of the cooling apparatus since the need for commonly-used thermal interface materials can be eliminated. Allows higher heat fluxes to be effectively dissipated without reaching critical heat flux since the heat sink module can provide jet streams with sufficient momentum to disrupt vapor formation on the surface to be cooled. Reduces the overall energy consumption and operating cost since the coolant flow rate can be reduced by reducing the pump speed. Provides heat exchanger which can ensure that reservoir maintains a volume of subcooled liquid that can be safely supplied to the pump without risk of vapor lock or instability by enabling heat rejection from the coolant.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a primary cooling loop of a cooling apparatus.    Cooling apparatus (1)    Heat source (12)    Coolant (50)    First inlet port (105)    Visual markings (132)