Highlights
•
A simple mathematical model was developed to predict drying kinetics of multi-dimensional freeze-drying.
•
The model based on classical heat and mass transfer equations, includes mass and heat transfer coefficients.
•
The essential coefficients were experimentally obtained via water sublimation tests.
•
The model equations could be solved using commercial spreadsheet software.
•
The model was adopted to peeled apple cubes, and it well predicted the experimental data.