Mathematical models describing heat, moisture and fat transfers during
deep-fat frying of beef meatballs were developed and validated agains
t experimental data consisting of temperatures at two locations in the
product, and average moisture and fat contents. Fat diffusivity in th
e product was 0.287 x 10(-7) m2s-1, while fat conductivity followed Ey
ring's model with frequency factor of 0.137 x 10(-6) ms-1 K-1 and acti
vation energy of 2.70 kJ mol-1.