Human Arterial Tree Simulation on TeraGrid - Center for Fluid ...

<strong>Human</strong> <strong>Arterial</strong> <strong>Tree</strong>
<strong>Simulation</strong> on TeraGrid
The CRUNCH group is a research group in the Division of Applied Mathematics
at Brown University. The thrust of its research is the development of numerical
algorithms, visualization methods and parallel software for continuum and
atomistic simulations in fluid mechanics and related applications.
Sketch of the human
vascular system
<strong>Arterial</strong> <strong>Tree</strong> Project
Cranial arteries reconstructed
from MRI images with gOREK
! Goal: to model blood flow interactions in different
regions of the cardiovascular system.
! High-performance computing is essential for modeling
3D unsteady fluid mechanics in arterial systems.
! Accurately capturing flow dynamics requires high
spatial resolution and meshes with millions of elements.
! CFD code NEKTAR-G2, developed at Brown, is based
on spectral/hp element methods; NEKTAR-G2 can
efficiently handle cross-site simulations on the TeraGrid.
! Recent simulations of 3D flow in the cranial vascular
system involved 65 arteries and the solution of flow
equations with over a billion degrees of freedom.
Collaborators:
Brown University
Leopold Grinberg
Susanna Makela
George Karniadakis
Argonne National Lab
Joseph Insley
Mike Papka
NIU/Argonne
Nicholas Karonis
Brian Toonen
Imperial College, UK
Spencer Sherwin
Children's Hospital,
Harvard Medical School
Tomer Anor
Joseph Madsen
Supported by an NSF CI-TEAM grant.
Special thanks to Leland Jameson, Frederica
Darema, and Almadena Chtchelkanova.

Parallel Paradigm on TeraGrid
To handle the computational demands of these simulations we turn to the
supercomputing resources offered by the TeraGrid, a network integrating powerful
open computing resources in the USA. We are working closely with computer
scientists at Northern Illinois University and Argonne National Lab to develop
middleware that can facilitate in the transitioning of simulation executions from a
single supercomputer to a cluster of supercomputers such as the TeraGrid. In
particular, we have focused on the use and further development of MPIg, which,
through services provided by the Globus Toolkit, relieves the computational scientist
from low-level details of secure process management, communication, and network
topology.
We aim to establish a biomechanics gateway on the TeraGrid and make the arterial
tree a platform and a simulation framework for further developments and systematic
studies in hemodynamics, disease modeling, and drug delivery.
Computation
Visualization
Viewer client: SC07, Reno, NV
Flow data
Servers
Globus handles
secure process
management,
MPIg handles
communications
For more information, visit http://www.cfm.brown.edu/crunch/ATREE/index.html