A heat exchanger is provided for dissipating heat from a fluid. The heat
exchanger includes a plurality of stacked pairs of plates. Each pair of
plates includes a first plate and a second plate. The first plate extends
along a first axis and has first and second sides. The first side of the
first plate has a generally sinusoidal recess therein that extends along
the first axis. The second plate extends along a second axis and has
first and second sides. The first side of the second plate has a
generally sinusoidal recess therein that extends along the second axis
and that is out of phase with the sinusoidal recesses in the first side
of the first plate. The first side of the first plate and the first side
of the second plate form a mating relationship with each other such that
the recess in the first side of the first plate communicates with the
recess in the first side of the second plate at a plurality of axially
spaced locations.