A cooling mechanism includes a first heat exchanger, a first fluid-flow port, and a second fluid-flow port. The first heat exchanger includes a forced-fluid driver to pump heat from inside an enclosed area to outside of the enclosed area. The first fluid-flow port accommodates a first fluid flow into the enclosed area and the second fluid-flow port is configured to accommodate a second fluid flow from the enclosed area. Note that the first fluid-flow port and the second fluid-flow port are approximately coplanar. In addition, a given fluid-flow port is tapered to have an associated cross-sectional area which is smaller at an edge of the given fluid-flow port that is proximate to the outside of the enclosed area than at an edge of the given fluid-flow port that is proximate to the inside of the enclosed area.