Abstract
It is well known that methods for solving fractional-order PDEs are grossly inadequate compared with integer-order PDEs. In this paper, a new approach combined with the separation method of semi-fixed variables and dynamical system method is introduced. As an example, a time-fractional reaction-diffusion equation with higher-order terms is studied under two different kinds of fractional-order differential operators. In different parametric regions, phase portraits of systems derived from the reaction-diffusion equation are presented. Existence and dynamic properties of solutions of this nonlinear time-fractional model are investigated. In some special parametric conditions, some exact solutions of this time-fractional models are obtained. The dynamical properties of some exact solutions are discussed, and the graphs of them are illustrated.
Similar content being viewed by others
Data Availability Statement
The author assures that all data present within the text of the manuscript are available and reliable.
References
Daftardar-Gejji, V., Jafari, H.: Adomian decomposition: a tool for solving a system of fractional differential equations. J. Math. Anal. Appl. 301(2), 508–518 (2005)
Bakkyaraj, T., Sahadevan, R.: An approximate solution to some classes of fractional nonlinear partial differential difference equation using Adomian decomposition method. J. Fract. Calc. Appl. 5(1), 37–52 (2014)
Bakkyaraj, T., Sahadevan, R.: Approximate analytical solution of two coupled time fractional nonlinear Schrodinger equations. Int. J. Appl. Comput. Math. 2(1), 113–135 (2016)
Bakkyaraj, T., Sahadevan, R.: On solutions of two coupled fractional time derivative Hirota equations. Nonlinear Dyn. 77(4), 1309–1322 (2014)
Sahadevan, R., Bakkyaraj, T.: Invariant analysis of time fractional generalized Burgers and Korteweg–de Vries equations. J. Math. Anal. Appl. 393(2), 341–347 (2012)
Bakkyaraj, T., Sahadevan, R.: Invariant analysis of nonlinear fractional ordinary differential equations with Riemann–Liouville derivative. Nonlinear Dyn. 80(1–2), 447–455 (2015)
Odibat, Z.M., Shaher, M.: The variational iteration method: an efficient scheme for handling fractional partial differential equations in fluid mechanics. Comput. Math. Appl. 58, 2199–2208 (2009)
Wu, G., Lee, E.W.M.: Fractional variational iteration method and its application. Phys. Lett. A 374(25), 2506–2509 (2010)
Momani, S., Zaid, O.: Comparison between the homotopy perturbation method and the variational iteration method for linear fractional partial differential equations. Comput. Math. Appl. 54(7–8), 910–919 (2007)
Sahadevan, R., Bakkyaraj, T.: Invariant subspace method and exact solutions of certain nonlinear time fractional partial differential equations. Fract. Calc. Appl. Anal. 18(1), 146–162 (2015)
Harris, P.A., Garra, R.: Analytic solution of nonlinear fractional Burgers-type equation by invariant subspace method. Nonlinear Stud. 20(4), 471–481 (2013)
Sahadevan, R., Prakash, P.: Exact solution of certain time fractional nonlinear partial differential equations. Nonlinear Dyn. 85(1), 659–673 (2016)
Elsayed, M.E.Z., Yasser, A.A., Reham, M.A.S.: The fractional complex transformation for nonlinear fractional partial differential equations in the mathematical physics. J. Assoc. Arab. Univ. Basic Appl. Sci. 19, 59–69 (2016)
Li, Z.B., Zhu, W.H., He, J.H.: Exact solutions of time-fractional heat conduction equation by the fractional complex transform. Therm. Sci. 16(2), 335–338 (2012)
Li, Z.B., He, J.H.: Fractional complex transform for fractional differential equations. Math. Comput. Appl. 15(5), 970–973 (2010)
Chen, J., Liu, F., Anh, V.: Analytical solution for the time-fractional telegraph equation by the method of separating variables. J. Math. Anal. Appl. 338, 1364–1377 (2008)
Jiang, H., Liu, F., Turner, I., Burrage, K.: Analytical solutions for the multi-term time-fractional diffusion-wave/diffusion equations in a finite domain. Comput. Math. Appl. 64, 3377–3388 (2012)
Luchko, Y.: Some uniqueness and existence results for the initial-boundary-value problems for the generalized time-fractional diffusion equation. Comput. Math. Appl. 59, 1766–1772 (2010)
Jumarie, G.: Fractional partial differential equations and modified Riemann–Liouville derivative new methods for solution. J. Appl. Math. Comput. 24(1–2), 31–48 (2007)
Jumarie, G.: Modified Riemann-Liouville derivative and fractional Taylor series of non-differentiable functions further results. Comput. Math. Appl. 51(9–10), 1367–1376 (2006)
Jumarie, G.: Cauchy’s integral formula via the modified Riemann–Liouville derivative for analytic functions of fractional order. Appl. Math. Lett. 23(12), 1444–1450 (2010)
He, J.H.: Geometrical explanation of the fractional complex transform and derivative chain rule for fractional calculus. Physica Lett. A 376, 257–259 (2012)
Tarasov, V.E.: On chain rule for fractional derivatives. Commun. Nonlinear Sci. Numer. Simul. 30(1), 1–4 (2016)
Rui, W.: Applications of homogenous balanced principle on investigating exact solutions to a series of time fractional nonlinear PDEs. Commun. Nonlinear Sci. Numer. Simul. 47, 253–266 (2017)
Rui, W.: Applications of integral bifurcation method together with homogeneous balanced principle on investigating exact solutions of time fractional nonlinear PDEs. Nonlinear Dyn. 91(1), 697–712 (2018)
Wu, C., Rui, W.: Method of separation variables combined with homogenous balanced principle for searching exact solutions of nonlinear time-fractional biological population model. Commun. Nonlinear Sci. Numer. Simul. 63, 88–100 (2018)
Rui, W.: Idea of invariant subspace combined with elementary integral method for investigating exact solutions of time-fractional NPDEs. Appl. Math. Comput. 339, 158–171 (2018)
Rui, W.: Dynamical system method for investigating existence and dynamical property of solution of nonlinear time-fractional PDEs. Nonlinear Dyn. 99, 2421–2440 (2020)
Li, J., Liu, Z.: Smooth and non-smooth traveling waves in a nonlinearly dispersive equation. Appl. Math. Model. 25(1), 41–56 (2000)
Li, J., Zhang, L.: Bifurcations of travelling wave solutions in generalized Pochhammer–Chree equation. Chaos Solitons Fractals 14(4), 581–593 (2002)
Li, J., Li, H., Li, S.: Bifurcations of travelling wave solutions for the generalized Kadomtsev–Petviashili equation. Chaos Solitons Fractals 20, 725–734 (2004)
Li, J., Chen, G.: Bifurcations of traveling wave solutions for four classes of nonlinear wave equations. Int. J. Bifurc. Chaos 15(2), 3973–3998 (2005)
Malaguti, L., Marcelli, C.: Sharp profiles in degenerate and doubly degenerate Fisher-KPP equations. J. Differ. Equ. 195(2), 471–496 (2003)
Pablo, A.D., Vázquez, J.L.: Travelling waves and finite propagation in a reaction-diffusion equation. J. Differ. Equ. 93(1), 19–61 (1991)
Aronson, D.G.: Density-dependent interaction systems. In: Stewart, W.E., Ray, W.H., Cobley, C.C. (eds.) Dynamics and Modelling of Reactive Systems. Academic Press, New York (1980)
Byrd, P.F., Friedman, M.D.: Handbook of Elliptic Integrals for Engineers and Scientists. Springer, Berlin (1971)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant No. 11361023), the Science and Technology Commission in Chongqing City of China (Grant No. cstc2018jcyjAX0766) and the Research Project of Chongqing Education Commission (Grant No. CXQT21014).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of Interest
The author declares that he has no conflict of interest.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Rui, W. Separation method of semi-fixed variables together with dynamical system method for solving nonlinear time-fractional PDEs with higher-order terms. Nonlinear Dyn 109, 943–961 (2022). https://doi.org/10.1007/s11071-022-07463-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11071-022-07463-x