In this article, a numerical solution to the growth-diffusion problem is investigated by obtaining results of computational experiments for non-homogeneous and finding its approximate using modified finite difference method. study carried out The scheme used second-order central in space with first-order time.

In the design of engineering structures, concrete is assumed to have homogeneously mechanical properties. However, in reality, material usually not uniform with respect height structures because segregation mostly occurs during construction. The higher density presented at, lower part structure due a proportion aggregate and vice versa. Moreover, disparity creep, shrinkage, hydration heat, curi...