The analyze of the numerical values is done by using the cell center values without using an interpolation scheme. Therefore, we are not using the plotOverLine filter that we can use in ParaView®. The data that are used for the plots are the values of each numerical cell which is close to the centerline. Based on that, we induce some natural errors because the cell centers are not at the centerline. For unstructured meshes that behavior is even worse and more random. To visualize the statement mentioned above, the analyzed cells of the meshes which have 40x40 cells are given below.