Prediction of batch heat transfer coefficients for pseudoplastic fluids ...

58
HEA T TRANSFeR
FIG 3-/
FLOW PATTERNS IN PROP£LLER AGITATED BAFFLEO VESSEL
Near the wall the temperature gradient is negligible
in the @ and z directions compared to that in the r direction.
The velocity gradient in the @ direction is negligible
Itihile the velocity gradient in the r direction is the most
important.
The velocity gradient in the z direction is
negligible except at the top and bottom hThere the radial
flow takes place.
Since only the major portion of the
wall is being considered, the velocity gradients in the z
direction will be neglected.
(The experimental portion of
this paper developed heat transfer data taken in a vessel
I,"i th both the cylindrical wall and the bottom j acke ted.
However, the theoretical analysis only considers the cylindrical
wall portion of the heat transfer surface.
A more
complete analysis would lead to the same final equation for
correlating experimental data.)
In general, the equations for the conservation of