A Lattice Boltzmann Simulation of Hemodynamics in a Patient-Specific Aortic Coarctation Model
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- Peters Randles A., Bächer M., Pfister H., Kaxiras E. (2013) A Lattice Boltzmann Simulation of Hemodynamics in a Patient-Specific Aortic Coarctation Model. In: Camara O., Mansi T., Pop M., Rhode K., Sermesant M., Young A. (eds) Statistical Atlases and Computational Models of the Heart. Imaging and Modelling Challenges. STACOM 2012. Lecture Notes in Computer Science, vol 7746. Springer, Berlin, Heidelberg
In this paper, we propose a system to determine the pressure gradient at rest in the aorta. We developed a technique to efficiently initialize a regular simulation grid from a patient-specific aortic triangulated model. On this grid we employ the lattice Boltzmann method to resolve the characteristic fluid flow through the vessel. The inflow rates, as measured physiologically, are imposed providing accurate pulsatile flow. The simulation required a resolution of at least 20 microns to ensure a convergence of the pressure calculation. HARVEY, a large-scale parallel code, was run on the IBM Blue Gene/Q supercomputer to model the flow at this high resolution. We analyze and evaluate the strengths and weaknesses of our system.
Keywordscomputational fluid dynamics coarctation of the aorta lattice boltzmann parallel computing
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