Warburton, Timothy2013-09-162013-09-162013-09-162013-09-162013-052013-09-16May 2013Stilwell, Nichole. "gNek: A GPU Accelerated Incompressible Navier Stokes Solver." (2013) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/72043">https://hdl.handle.net/1911/72043</a>.https://hdl.handle.net/1911/72043This thesis presents a GPU accelerated implementation of a high order splitting scheme with a spectral element discretization for the incompressible Navier Stokes (INS) equations. While others have implemented this scheme on clusters of processors using the Nek5000 code, to my knowledge this thesis is the first to explore its performance on the GPU. This work implements several of the Nek5000 algorithms using OpenCL kernels that efficiently utilize the GPU memory architecture, and achieve massively parallel on chip computations. These rapid computations have the potential to significantly enhance computational fluid dynamics (CFD) simulations that arise in areas such as weather modeling or aircraft design procedures. I present convergence results for several test cases including channel, shear, Kovasznay, and lid-driven cavity flow problems, which achieve the proven convergence results.application/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.Incompressible Navier StokesComputational fluid dynamicsGPUAcceleratedFluid flowSpectral element methodProjection methodSplitting methodDomain decompositionThesis2013-09-16123456789/ETD-2013-05-449