Quantum Computational Fluid Dynamics - WP Extended Set of Benchmark CFD Examples and Solutions: Deliverable 2.1. --- Advection-diffusion problems

A subset of the WP Extended Set of Benchmark CFD Examples and Solutions: Deliverable 2.1. in relation to the European Union's Horizon Europe research and innovation program (HORIZON-CL4-2021-DIGITAL-EMERGING-02-10) under grant agreement No. 101080085 QCFD (https://doi.org/10.3030/101080085).  The data refers to the advection-diffusion equation which describes the advection of a scalar quantity by an incompressible velocity field in a medium with diffusivity. For spatial discretization, first-order central and second-order central FD schemes are employed to transform the partial differential equation into a system of ordinary differential equations. Time integration is performed using an explicit time-marching scheme such as the forward Euler method.