OpenFOAM CFD (Open Field Operation and Manipulation, Computational Fluid Dynamics) is an open source software extensively used to get fluid problem solutions through their specialized libraries. The complete C++ modules run in a Linux operating system basis.
ParaView (Parallel Visualization Application) is a computer tool which can run under Windows OS. This tool has been designed to visualize data sets either small or very large.
ParaView visualization example of an OpenFOAM tutorial case data