ESI Group, pioneer and world-leader in Virtual Prototyping and Virtual Engineering solutions, today announces the acquisition of OpenCFD Ltd., the leader in the Open Source Computational Fluid Dynamics (CFD) software segment, from SGI, the trusted leader in Technical Computing. ESI Group consequently becomes the owner of the OpenFOAM® trademark, widely recognized in automotive, energy, aerospace and other industry sectors, and assumes responsibility and initiative for the further development, quality and support of the software. ESI and SGI will be expanding their partnership and go to market collaboration to improve accessibility of CFD, at affordable cost, reliable quality, and competitive performance.