Identification of a time-dependent diffusivity coefficient in heat-like space-time fractional differential equations

Identification of a time-dependent diffusivity coefficient in heat-like space-time fractional differential equations

The goal of this research is to reveal the unknown time dependent diffusion coefficient in space-time fractional differential equations by means of fractional Taylor series method. Unlike most methods used in inverse problems, using no over-measured data is a substantial advantage of this method. As a result, the unknown diffusion coefficient could be determined with high precision. Illustrative examples shows that the retrieved unknown coefficient and the solution of the problem are in a high agreement with the exact solution of the corresponding the inverse problems.

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  • 1. Kilbas, A.A. , Srivastava, H.M. and Trujillo, J.J. Theory and applications of fractional differential equations, Amsterdam: Elsevier, 2006.
  • 2. } Podlubny, I. Fractional differential equation, San Diego, CA: Academic Press, 1999.
  • 3. Sabatier, J., Agarwal, O.P. and Machado, J.A.T.(eds). Advances in fractional calculus: theoretical developments and applications in physics and engineering, Dordrecht: Springer, 2007.
  • 4. Samko, S.G., Kilbas, A.A. and Marichev, O.I. Fractional integrals and derivatives theory and applications, Amsterdam: Gordon and Breach, 1993.
  • 5. Odibat, Z. Approximations of fractional integrals and Caputo fractional derivatives. Appl. Math. Comput.178, 527-533, 2006.