Abstract:We present \texttt{MARUT}, a scalable multi-GPU computational fluid dynamics (CFD) framework designed for high-fidelity simulations of compressible flows spanning subsonic to hypersonic regimes, including chemically reacting nonequilibrium flows with finite-rate chemistry and adaptive mesh refinement (AMR). The framework addresses a central challenge in contemporary scientific computing: the development of numerically accurate and computationally scalable algorithms capable of resolving strongly nonlinear, multiscale flow physics on emerging heterogeneous supercomputing architectures. Built around a distributed-memory MPI-parallel infrastructure and implemented natively on NVIDIA GPUs, \texttt{MARUT} combines high-order spectral discontinuous Galerkin discretisations with strong-stability-preserving Runge--Kutta time integration to achieve low-dissipation and high-resolution representation of shocks, vortical structures and reactive interfaces. Dynamic AMR further enables efficient concentration of computational resources in localized regions of physical complexity, thereby substantially reducing computational cost while preserving solution fidelity. \texttt{MARUT} is designed to maintain strong parallel efficiency through GPU-resident computations and scalable MPI communication strategies, achieving near-linear strong scaling across multiple GPUs. The solver is validated against a broad suite of canonical benchmark problems involving inviscid and reactive compressible flows, including subsonic, transonic, supersonic and hypersonic configurations with multi-species nonequilibrium chemistry, where the numerical predictions show close agreement with established reference solutions. Beyond its immediate performance characteristics, the framework reflects the broader transition of computational science towards modular, adaptive and AI-compatible simulation ecosystems.
| Comments: | 35 Pages, 15 Figures |
| Subjects: | Computational Physics (physics.comp-ph); Mathematical Physics (math-ph) |
| Cite as: | arXiv:2605.26388 [physics.comp-ph] |
| (or arXiv:2605.26388v1 [physics.comp-ph] for this version) | |
| https://doi.org/10.48550/arXiv.2605.26388 arXiv-issued DOI via DataCite (pending registration) |
From: Ameya Jagtap Dr [view email]
[v1]
Mon, 25 May 2026 23:33:41 UTC (2,606 KB)
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