FDTD techniques applied to acoustic propagation in vegetable tissue: the Elastodynamic Behavior of the Orange Fruit

摘要: The plant tissues, in particular the orange’s skin, are essentially aqueous-filled structures of varying density and elasticity composed by fat acids substances, as well areas intercellular air. In recent years many techniques have been developed for ultrasonic characterization fruit vegetables postharvest processes. All found common macroscopic acoustic parameters: a slow propagation speed large absorption. It is intended therefore to obtain prediction model ultrasounds this viscoelastic heterogeneous media FDTD (Finite Difference Time Domain) techniques. Thus, paper presents time domain numerical simulating tissue. This correctly describes special characteristics wave experimentally detected these biological emphasizing need elastic frequency dependent characteristics: modulus. These simulation results will be compared with measures obtained from an experimental device validate model. validation mechanical has great interest because it deepen understanding development new complex materials, providing tools predicting processes kind media.