Numerical solutions of the coupled unsteady nonlinear convection-diffusion equations based on generalized finite difference methodZhuo-Jia Fu, Zhuo-Chao Tang, Hai-Tao Zhao, Po-Wei Li and Timon RabczukEur. Phys. J. Plus, 134 6 (2019) 272DOI: https://doi.org/10.1140/epjp/i2019-12786-7