HEAT AND MASS-TRANSFER RELATIONSHIP IN COMBINED INFRARED AND CONVECTIVE DRYING

Results from three experimental studies are reviewed in order to exami ne the relationship between the heat and mass transfer coefficients in the combined infrared and convective drying process. These results de monstrated that the heat and mass transfer coefficients in infrared co nvective drying verify the analogy's classical result which express th eir ratio in terms of the Schmidt to Prandtl number. In addition the e ffect of high mass transfer rates on the heat and mass transfer coeffi cients is shown to be taken into account through the use of the bounda ry layer theory.