摘要 :
The present paper describes the performance of URANOS, a high-fidelity Direct and Large-Eddy Simulation Navier-Stokes solver specifically developed for wall-bounded compressible flows. The code combines cutting-edge numerical meth...
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The present paper describes the performance of URANOS, a high-fidelity Direct and Large-Eddy Simulation Navier-Stokes solver specifically developed for wall-bounded compressible flows. The code combines cutting-edge numerical methods peculiarly developed for high-speed turbulent flow simulations and is tailored to modern high-performance computing systems due to MPI parallelization combined with multi-GPUs communication access. In particular, OpenACC directives are implemented for GPU enabling offloading computational loads onto accelerators cards, making URANOS an easily maintained solver as well as guaranteeing extreme flexibility and portability. The solver validation is detailed for a broad range of Mach numbers, from low-speed to compressible cases. In particular, velocity statistics and Reynolds stress components for canonical channel flow and turbulent boundary layer configurations obtained with URANOS well agree with high-quality DNS data. Computational performance and scaling properties are tested on several multi-GPU-equipped clusters. Thus, with URANOS, the scientific community can take advantage of a GPU-accelerated solver in dealing with fluid modeling for aerodynamics applications.
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摘要 :
The present paper describes the performance of URANOS, a high-fidelity Direct and Large-Eddy Simulation Navier-Stokes solver specifically developed for wall-bounded compressible flows. The code combines cutting-edge numerical meth...
展开
The present paper describes the performance of URANOS, a high-fidelity Direct and Large-Eddy Simulation Navier-Stokes solver specifically developed for wall-bounded compressible flows. The code combines cutting-edge numerical methods peculiarly developed for high-speed turbulent flow simulations and is tailored to modern high-performance computing systems due to MPI parallelization combined with multi-GPUs communication access. In particular, OpenACC directives are implemented for GPU enabling offloading computational loads onto accelerators cards, making URANOS an easily maintained solver as well as guaranteeing extreme flexibility and portability. The solver validation is detailed for a broad range of Mach numbers, from low-speed to compressible cases. In particular, velocity statistics and Reynolds stress components for canonical channel flow and turbulent boundary layer configurations obtained with URANOS well agree with high-quality DNS data. Computational performance and scaling properties are tested on several multi-GPU-equipped clusters. Thus, with URANOS, the scientific community can take advantage of a GPU-accelerated solver in dealing with fluid modeling for aerodynamics applications.
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摘要 :
We present our methodology concerning wall-bounded flow modelling: A unifying strategy for wall-modelled and wall-modelled Large-Eddy Simulation (LES) approaches in the framework of compressible flows. The proposed method allows i...
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We present our methodology concerning wall-bounded flow modelling: A unifying strategy for wall-modelled and wall-modelled Large-Eddy Simulation (LES) approaches in the framework of compressible flows. The proposed method allows imposing the proper wall shear stress and heat flux, preserving both the no-slip and the isothermal/adiabatic conditions for the velocity and temperature fields. Minimally algorithmically intrusive, the technique automatically switches between wall-resolved and wall-modelled LES according to the local near-wall resolution. The results highlight the ability of the present method to accurately reproduce the outer layer turbulent dynamics of turbulent channels and boundary layer flows. In particular, velocity statistics and Reynolds stress components agree with reference Direct Numerical Simulations (DNS) and wall-resolved LES, confirming that the present methodology can be effectively employed to simulate wall-bounded flows at high Reynolds numbers.
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