The most striking characteristic of the Sterideal is the continuous coil of the pipes. If a product enters a coiled path, centrifugal forces act upon it. Velocity differences in the tube cross-section cause the centrifugal forces to vary. This results in vortices in the cross section, the so called “Dean vortices”.
Dean vortices represent a secondary flow perpendicular plane relative to the forward flow in the tube. These vortices cause mixing in the cross-section and ensure markedly improved heat transfer, both during heating and cooling. In particular for viscous products, the increase in heat transfer at increasing Dean numbers, is spectacular.
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