Abstract-Broadcast has been traditionally regarded as a prohibitive communication transaction in multiprocessor environments. Nowadays, such constraint largely drives the design of architectures and algorithms all-pervasive in diverse computing domains, directly and indirectly leading to diminishing performance returns as we reach the manycore era. Novel interconnect technologies could allow to revert this trend by offering, among others, improved broadcast support even in large-scale chip multiprocessors. In this position paper, the prospects of wireless on-chip communication technologies pointing towards low-latency (a few cycles) and energy-eff cient (a few pJ/bit) broadcast are outlined. This work also discusses the challenges and potential impact of adopting these technologies as key enablers of unconventional hardware architectures and algorithmic approaches, in the pathway of signif cantly improving the performance, energy eff ciency, scalability and programmability of manycore chips.

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Massively parallel numerical simulation using up to 36,000 CPU cores of an industrial-scale polydispersed reactive pressurized fluidized bed with a mesh of one billion cells. (2020) Powder Technology, 366. 906-924. ISSN 00325910 .

Computational fluid dynamics (CFD) is the main field of computational mechanics that has historically benefited from advances in high-performance computing. Highperformance computing involves several techniques to make a simulation efficient and fast, such as distributed memory parallelism, shared memory parallelism, vectorization, memory access optimizations, etc. As an introduction, we present the anatomy of supercomputers, with special emphasis on HPC aspects relevant to CFD. Then, we develop some of the HPC concepts and numerical techniques applied to the complete CFD simulation framework: from preprocess (meshing) to postprocess (visualization) through the simulation itself (assembly and iterative solvers).

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