Experiments on hydrodynamic and heat transfer behavior of the flow in
a twisted curved channel were conducted in a water tunnel and also in
two heat exchanger coils tested in a heat exchanger test facility. The
flow regime, designated ''chaotic advection,'' is a subclass of lamin
ar flow with high mixing properties. Preliminary results show that hea
t transfer is enhanced due to the chaotic trajectories generated in th
e flow.