The determination of the convective heat transfer
coefficient of stirred yoghurt in the plate heat exchanger
was based on the following assumptions: average constant
thermal properties (thermal conductivity and specific
heat) and convective heat transfer coefficients along
the heat exchanger, negligible internal heat generation
and negligible free convection.
In the present study the plate heat exchanger was
operating with a parallel arrangement and in countercurrent.
Thus, the volumetric flowrate of each fluid can
be expressed in terms of the number of channels per
pass, as follows