Time-accurate, parallel, multi-zone, multi-block solver to study the human cardio-vascular system

Area of Science:

• Computational fluid dynamics
• Biomedical engineering
• Cardiovascular research

Background:

• Accurate simulation of human cardiovascular system dynamics is crucial for understanding various pathologies.
• Existing computational models often face challenges with complex geometries and dynamic boundary conditions.

Purpose of the Study:

• To develop and validate a parallel, time-accurate flow solver for studying the human cardiovascular system.
• To enable the simulation of complex, three-dimensional vascular networks with moving boundaries and grids.

Main Methods:

• Numerical solution of unsteady, three-dimensional, incompressible Navier-Stokes equations.
• Utilized a second-order in time, third-order upwind finite volume method with pseudo-compressibility and dual time-stepping.
• Employed domain decomposition with MPI for parallel execution on a supercomputer.

Main Results:

• The developed solver successfully handles complex 3D vascular geometries and moving boundaries.
• Numerical simulations validated the code's accuracy for biologically relevant flows.
• The parallel implementation demonstrated efficient data partitioning and inter-subdomain communication.

Conclusions:

• The parallel, time-accurate flow solver is a capable tool for investigating human cardiovascular system dynamics.
• This computational approach facilitates the study of complex blood flow patterns in realistic vascular models.
• The solver's flexibility and accuracy pave the way for enhanced cardiovascular research and potential clinical applications.