Solar energy paper index
Scaling WaterLily.jl with MPI and an improved geometric multigrid solver
One-line summary
A solar energy research paper on Scaling WaterLily.jl with MPI and an improved geometric multigrid solver.
Engineering notes
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Chinese explanation / 中文解读
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Original abstract
We present recent performance-oriented developments in WaterLily.jl, a scale-resolving incompressible flow solver written in pure Julia that runs seamlessly on CPUs and GPUs of any vendor. Supported by the newly added MPI-based parallelism, strong-scalability tests display a near-ideal linear trend, and weak-scaling efficiency is kept above 85\% before node memory-concurrency contention dominates parallel performance. Inter-node weak scalability is sustained above 96\% with grid size up to 1 billion cells. We further benchmark improvements to the geometric multigrid Poisson solver enabled by an adaptive under-relaxed red-black Gauss--Seidel smoother together with anisotropic coarsening operators.
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