Moisture diffusivity of corn kernel components during adsorption. II. Pericap
1994
Muthukumarappan, K. | Gunasekaran, S.
A corn kernel was modeled as a slab core (corn without pericarp) and a slab shell (pericarp), and moisture diffusivity of the pericarp was estimated by optimizing the experimental and theoretical adsorption data using a finite difference technique. The diffusion equations were solved using the Crank-Nicolson scheme. Experimental data were obtained from thin-layer moisture adsorption tests using two varieties of corn (FR27 X MO17 and P3576) with and without pericarp. Air temperatures of 25, 30, 35, and 40 degrees C each at 75, 80, and 90% relative humidity were used. The mean moisture diffusivity of pericarp increased with air temperature (0.355 X 10(-9) to 0.553 X 10(-9) m2/h) and decreased with air relative humidity (0.435 x 10-9 to 0.498 x 10-9 m2/h). Moisture diffusivity values of corn pericarp were much lower (about two orders of magnitude) than those of corn with and without pericarp.
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