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Effect of Taylor Vortex on Melt Crystallization of Fatty Acids

By employing an annular‐cylindrical‐type apparatus operated under a constant cooling rate, melt crystallization is studied to condense a saturated fatty acid (FA) from a binary mixture of the saturated FA with unsaturated FA. In the annular space between the stationary outer cylinder and the rotating inner cylinder, counter‐rotating toroidal vortices, that is, the Taylor vortices are observed. The vortices are found to play a unique role in the solidification of FAs to form a unique wavy layer on the inner cylinder. The mass and heat transfer analysis by numerical calculation reveals that both the velocity and temperature distributions change depending on the position in the annular space because of the centrifugal or centripetal radial flow caused by the Taylor vortices.