Challenges in fluid flow simulations using exascale computing
In this paper, we briefly discuss the challenges in porting hydrodynamic codes to futuristic
exascale HPC systems. In particular, we sketch the computational complexities of finite
difference (FD) method, pseudo-spectral method, and fast Fourier transform (FFT). The
global data communication among the compute cores brings down the efficiency of pseudo-
spectral codes and FFT. A FD solver involves relatively lower data communication. However,
an incompressible FD flow solver has a pressure Poisson equation, whose computation in …
exascale HPC systems. In particular, we sketch the computational complexities of finite
difference (FD) method, pseudo-spectral method, and fast Fourier transform (FFT). The
global data communication among the compute cores brings down the efficiency of pseudo-
spectral codes and FFT. A FD solver involves relatively lower data communication. However,
an incompressible FD flow solver has a pressure Poisson equation, whose computation in …
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