Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7604
Authors: Herault, A.* 
Bilotta, G.* 
Vicari, A.* 
Rustico, E.* 
Del Negro, C.* 
Title: Numerical simulation of lava flow using a GPU SPH model
Issue Date: 2011
Series/Report no.: 5/54 (2011)
DOI: 10.4401/ag-5343
URI: http://hdl.handle.net/2122/7604
Keywords: GPGPU, Modeling, HPC, Smoothed particle hydrodynamics, Hazard, Lava
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous 
05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous 
05. General::05.01. Computational geophysics::05.01.05. Algorithms and implementation 
Abstract: A smoothed particle hydrodynamics (SPH) method for lava-flow modeling was implemented on a graphical processing unit (GPU) using the compute unified device architecture (CUDA) developed by NVIDIA. This resulted in speed-ups of up to two orders of magnitude. The three-dimensional model can simulate lava flow on a real topography with free-surface, non- Newtonian fluids, and with phase change. The entire SPH code has three main components, neighbor list construction, force computation, and integration of the equation of motion, and it is computed on the GPU, fully exploiting the computational power. The simulation speed achieved is one to two orders of magnitude faster than the equivalent central processing unit (CPU) code. This GPU implementation of SPH allows high resolution SPH modeling in hours and days, rather than in weeks and months, on inexpensive and readily available hardware.
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