Coolant-cooled heat sink configured for accelerating coolant flow

A cooled electronic module comprising:

• at least one electronic component to be cooled;
• and
• a cooling apparatus to facilitate cooling the at least one electronic component, the cooling apparatus comprising:
• a coolant-cooled heat sink coupled to the at least one electronic component to be cooled, the coolant-cooled heat sink comprising:
• a thermally conductive structure with a coolant-carrying compartment comprising, at least in part, a plurality of thermally conductive fins defining a plurality of coolant flow channels through which coolant flows in a direction substantially parallel to a main heat transfer surface of the thermally conductive structure coupled to the at least one electronic component, the plurality of thermally conductive fins decreasing in height and increasing in width in the direction of coolant flow, and the plurality of coolant flow channels each having a cross-sectional coolant flow area which decreases in height and decreases in width in the direction of coolant flow through the coolant-carrying compartment;
• a baffle within the coolant-carrying compartment disposed over, and in contact with, the plurality of thermally conductive throughout the plurality of thermally conductive fins in the direction of coolant flow fins, the baffle increasing in height in the direction of coolant flow in proportion to the decreasing in height of the plurality of thermally conductive fins in the direction of coolant flow, and the baffle ensuring that all coolant flow through the coolant-carrying compartment flows between the plurality of thermally conductive fins, within the plurality of coolant flow channels of decreasing cross-sectional flow area;
• a coolant inlet manifold region and a coolant outlet manifold region within the coolant-carrying compartment of the thermally conductive structure to facilitate coolant flow through the plurality of coolant flow channels, the plurality of thermally conductive fins extending between the coolant inlet manifold region and the coolant outlet manifold region;
• and
• wherein the decreasing height and width of the respective cross-sectional coolant flow area of each coolant flow channel of the plurality of coolant flow channels facilitates an increasing effective heat transfer coefficient between the main heat transfer surface and the coolant in the direction of coolant flow by, at least in part, accelerating the coolant flow within the plurality of coolant flow channels of the coolant-cooled heat sink.