A quartic trigonometric B-spline collocation method for a general class of nonlinear singular boundary value problems

This study deals with the numerical solution of a general class of nonlinear singular boundary value problems (SBVPs). Firstly, we modify the original model problem at the singular point and then we construct a numerical technique based on quartic trigonometric B-spline functions to solve the resulting problem. Numerical experiments are performed to demonstrate the applicability and efficiency of the method. More specifically, we consider three real-life problems: (1) thermal explosion in a cylindrical vessel; (2) isothermal gas sphere; (3) oxygen diffusion in a spherical cell. The computed results are compared with the results obtained by the compact finite difference method (CFDM) (Roul et al. in Appl Math Comput 350:283-304, 2019) and the B-spline collocation method (Thula and Roul in Mediterr J Math 15(4):176, 2018) in order to justify the advantage of present method. The proposed method is a promising one to handle the general class of SBVPs.