Explicit and implicit meshless methods for linear advection-diffusion-type partial differential equations

Simple, mesh=grid free, explicit and implicit numerical schemes for the solution of linear advection{di usion problems is developed and validated herein. Unlike the mesh or grid-based methods, these schemes use well distributed quasi-random points and approximate the solution using global radial basis functions. The schemes can be seen as generalized nite di erences with random points instead of a regular grid sys- tem. This allows the computation of problems with complex-shaped boundaries in higher dimensions with no need for complex mesh=grid structure and with no extra implementation di culties.