A 1d lumped-parameter/3d CFD approach for pressure drop in the aortic coarctation

  • Authors:

  • Eduardo Soudah;Maurizio Bordone;Pooyan Davdan;Riccardo Rossi

  • Affiliations:

  • CIMNE Biomedical Engineering Department, Centre Internacional de Mètodes Numèrics en Enginyeria, Barcelona, Spain;CIMNE Biomedical Engineering Department, Centre Internacional de Mètodes Numèrics en Enginyeria, Barcelona, Spain;CIMNE Biomedical Engineering Department, Centre Internacional de Mètodes Numèrics en Enginyeria, Barcelona, Spain;CIMNE Biomedical Engineering Department, Centre Internacional de Mètodes Numèrics en Enginyeria, Barcelona, Spain

  • Venue:
  • STACOM'12 Proceedings of the third international conference on Statistical Atlases and Computational Models of the Heart: imaging and modelling challenges
  • Year:
  • 2012

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Abstract

Aortic Coarctation is a congenital constriction of the aorta that increases blood pressure above the constriction and hinders the flow below it. Based on a 3D surface mesh of a moderate thoracic coarctation, a high quality volume mesh is created using an optimal tetrahedral aspect ratio for whole domain. In order to quantify the severity of this constriction, a coupled 1D lumped-parameter/3D CFD approach is used to calculate the pressure drop through the coarctation. The CFD computation is performed assuming that the arterial wall is rigid and the blood is considered a homogeneous Newtonian fluid with density r = 0.001 gr/mm3 and a dynamic viscosity m = 0.004 gr/mm/sec in laminar flow. The boundary conditions of the 3D model (inlet and outlet conditions) have been calculated using a 1D model. Parallelization procedures will be used in order to increase the performance of the CFD calculations.