Abstract
In this article, we investigate the nonlinear model describing the various physical and chemical phenomena named the Kuramoto-Sivashinsky equation. We implemented the natural decomposition method, a novel technique, mixed with the Caputo-Fabrizio (CF) and Atangana-Baleanu deriavatives in Caputo manner (ABC) fractional derivatives for obtaining the approximate analytical solution of the fractional Kuramoto-Sivashinsky equation (FKS). The proposed method gives a series form solution which converges quickly towards the exact solution. To show the accuracy of the proposed method, we examine three different cases. We presented proposed method results by means of graphs and tables to ensure proposed method validity. Further, the behavior of the achieved results for the fractional order is also presented. The results we obtain by implementing the proposed method shows that our technique is extremely efficient and simple to investigate the behaviour of nonlinear models found in science and technology.