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Displaying 1-10 out of 10 total
Stochastic Computational Fluid Mechanics
Found in: Computing in Science and Engineering
By Guang Lin, Xiaoliang Wan, Chau-Hsing Su, George Em Karniadakis
Issue Date:March 2007
pp. 21-29
Stochastic simulations in computational fluid dynamics let researchers model uncertainties beyond numerical discretization errors. The authors present examples of stochastic simulations of compressible and incompressible flows and provide analytical soluti...
 
Tightly Coupled Atomistic-Continuum Simulations of Brain Blood Flow on Petaflop Supercomputers
Found in: Computing in Science & Engineering
By Leopold Grinberg,Joseph A. Insley,Dmitry A. Fedosov,Vitali Morozov,Michael E. Papka,George Em Karniadakis
Issue Date:November 2012
pp. 58-67
Several advances on the mathematical, computational, and visualization fronts have led to the first truly multiscale simulation and visualization of a realistic biological system.
 
A new computational paradigm in multiscale simulations: application to brain blood flow
Found in: SC Conference
By Leopold Grinberg,Joseph A. Insley,Vitali Morozov,Michael E. Papka,George Em Karniadakis,Dmitry Fedosov,Kalyan Kumaran
Issue Date:November 2011
pp. 1-5
Interfacing atomistic-based with continuum-based simulation codes is now required in many multiscale physical and biological systems. We present the computational advances that have enabled the first multiscale simulation on 190,740 processors by coupling ...
 
Cross-Site Computations on the TeraGrid
Found in: Computing in Science and Engineering
By Suchuan Dong, George Em Karniadakis, Nicholas T. Karonis
Issue Date:September 2005
pp. 14-23
The TeraGrid's collective computing resources can help researchers perform very-large-scale simulations in computational fluid dynamics (CFD) applications, but doing so requires tightly coupled communications among different sites. The authors examine a sc...
 
A Seamless Approach to Multiscale Complex Fluid Simulation
Found in: Computing in Science and Engineering
By Vasileios Symeonidis, George Em Karniadakis, Bruce Caswell
Issue Date:May 2005
pp. 39-46
Dissipative particle dynamics (DPD) is a simulation method at mesoscopic scales that bridges the gap between molecular dynamics and continuum hydrodynamics. It can simulate efficiently complex liquids and dense suspensions using only a few thousands of vir...
 
Flow Past a Stationary and Moving Cylinder: DNS at Re=10,000
Found in: Defense Users Group Conference, Department of
By Suchuan Dong, Didier Lucor, George Em Karniadakis
Issue Date:June 2004
pp. 88-95
We conduct direct numerical simulations with 300 million degrees of freedom of turbulent flows past a stationary and a forced oscillating rigid cylinder at the Reynolds number Re=10,000. This one-order of magnitude increase in Reynolds number (compared to ...
 
Dual-Level Parallelism for Deterministic and Stochastic CFD Problems
Found in: SC Conference
By Suchuan Dong, George Em. Karniadakis
Issue Date:November 2002
pp. 43
A hybrid two-level parallelism using MPI/OpenMP is implemented in the general-purpose spectral/hp element CFD code NekTar to take advantage of the hierarchical structures arising in deterministic and stochastic CFD problems. We take a coarse grain approach...
 
Communication Performance Models in Prism : A Spectral Element-Fourier Parallel Navier-Stokes Solver
Found in: SC Conference
By Constantinos Evangelinos, George Em Karniadakis
Issue Date:January 1996
pp. 20
In this paper we analyze communication patterns in the parallel three-dimensional Navier-Stokes sover Prism, and present performance results on the IBM SP2, the Cray T3D and the SGI Power Challenge XL. Prism is used for direct numerical simulation of turbu...
 
Multiscale simulations of blood-flow: from a platelet to an artery
Found in: Proceedings of the 1st Conference of the Extreme Science and Engineering Discovery Environment: Bridging from the eXtreme to the campus and beyond (XSEDE '12)
By George Em Karniadakis, Huan Lei, Joseph A. Insley, Leopold Grinberg, Mingge Deng
Issue Date:July 2012
pp. 1-7
We review our recent advances on multiscale modeling of blood flow including blood rheology. We focus on the objectives, methods, computational complexity and overall methodology for simulations at the level of glycocalyx (< 1 μm), blood cells (2--8&...
     
Communication patterns and models in prism: a spectral element-Fourier parallel Navier-Stokes solver
Found in: Proceedings of the 1996 ACM/IEEE conference on Supercomputing (CDROM) (Supercomputing '96)
By Constantinos Evangelinos, George Em Karniadakis
Issue Date:November 1996
pp. 20-es
In this paper we analyze communication patterns in the parallel three-dimensional Navier-Stokes solver Prism, and present performance results on the IBM SP2, the Cray T3D and the SGI Power Challenge XL. Prism is used for direct numerical simulation of turb...
     
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