The solution of fluid computer based on N-S equations is the core of Computational Fluid Dynamics (CFD). and Finite Volume Method (FVM) is the computational method of the main stream of fluid. The grid technology closely related to CFD is only a foundation. and it becomes more and more lagging with the development of CFD in computer. https://parisnaturalfoodes.shop/product-category/cardo-mag-2-0/