In this talk, I will present a Molecular Dynamics N-body simulation for multi-accelerator heterogeneous architectures. It is based on OpenCL and features a new force computation algorithm focusing on using a low memory footprint while maintaining a high performance level. I will describe the implementation and detail how we had to slightly adapt the kernels for accelerators as different as NVIDIA GPU and Intel Xeon Phi to provide better opportunities for code optimizations. Finally I will present our research perspectives about enhancing the OpenCL ecosystem to achieve better portability and performance
