This work studies the numerical approximation of the solution of a non-linear 2D Boussinesq type system, where we implement a posteriori error method for the automatic refinement of the finite element method mesh to reduce the error in the approximation. In previous works, the existence and uniqueness of solutions for this type of system has been studied (Mejía & Muñoz, 2021; Chen, 2009). In this continuation of our work, we present post hoc error estimates for semi-discrete approximations and compare them with other estimates obtained automatically (Rognes & Logg, 2013).
keywords:
finite element method, a posteriori estimate, Boussinesq systems