PyFR

"PyFR is an open-source Python based framework for solving advection-diffusion type problems on streaming architectures using the Flux Reconstruction approach of Huynh. The framework is designed to solve a range of governing systems on mixed unstructured grids containing various element types. It is also designed to target a range of hardware platforms via use of an in-built domain specific language derived from the Mako templating engine."

There are backends for CUDA, OpenCL, OpenMP and MIC.

http://pyfr.org/

http://hgpu.org/?p=15147

http://on-demand.gputechconf.com/gtc/2016/presentation/s6329-freddie-witherden-petascale-computational-fluid-dynamics.pdf

PyFR: Next Generation Computational Fluid Dynamics on GPU Platforms - http://on-demand.gputechconf.com/gtc/2015/presentation/S5372-Freddie-Witherden.pdf

 PyFR: Technical Challenges of Bringing Next Generation Computational Fluid Dynamics to GPU Platforms - http://on-demand.gputechconf.com/gtc/2014/presentations/S4649-pyfr-tech-challenges-cfd-gpu-platforms.pdf