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Investigation of Newtonian and non-Newtonian Air-Blast Atomization Using OpenFoam

In this study, the momentum is mainly transferred from the liquid to the gas. The velocity gradient at the interface creates a thin boundary layer in the gas phase. Resolving this boundary layer is currently out of reach of the usual LES meshes of injectors, and remains a challenge for the actual interface modeling techniques. Resolving accurately such a range of scales for the liquid, and the ...

Performance, Capacity and Scalability Assessment & Improvements for Realistic Simulation Software – Abaqus/Standard and Abaqus/Explicit

There is a significant focus in product development to enable virtual testing using simulation software. Both of our products are widely used for simulation of engineering problems in many industries: Aerospace &Defense (Airbus, Boeing, Lockheed Martin, US Army, US Navy): Aerostructures, Aeroengines, Defense Systems, Space Systems Automative &Transportation (BMW, Ford, GM, Honda, Toyota): Tires...

This is not your parents’ Fortran: Object-Oriented, Parallel and Functional Programming in Modern Fortran

The Oak Ridge Leadership Computing Facility (OLCF) will host "This is not your parents' Fortran: Object-Oriented, Parallel and Functional Programming in Modern Fortran" from Sandia National Laboratory's, Damian Rouson. This event is a three-day workshop. Participation is limited to those who already have access to the Oak Ridge National Laboratory (ORNL) campus. Registration is required. ...

2015 OLCF Users Conference Call: Globus Simplified, OpenACC Hackathon User Experience.

The OLCF hosts monthly User Conference Call. These calls are your opportunity to speak with center personnel to get the latest updates, express any concerns you may have, etc. No registration is required for this event. Monthly Topics: Globus Simplified, OpenACC Hackathon User Experi...

Summit at GTC 2018

Oak Ridge Leadership Computing Facility (OLCF) staff members and users are presenting at the GPU Technology Conference (GTC) in March with a Summit-foc...

GPU Accelerated Libraries

Several GPU accelerated libraries are provided on OLCF systems. Usage for the most common accelerated libraries is outlined below. MAGMA The MAGMA project aims to develop a dense linear algebra library similar to LAPACK but for heterogeneous/hybrid architectures. For C and Fortran code currently using LAPACK this should be a relatively simple port and does not require CUDA knowledg...

OLCF User Group Meeting (December 2015)

OLCF User Group Call: Hackathon User Expereince OpenAcc with GCC6 User Driven Content This talk was originally given on 12-17-15 at OLCF User Group Call. User Philip LoCascio speaks about his experience with testing the GCC5 compiler and OpenACC at the last OpenACC Hackathon. He states, "I tested OpenACC with the GCC5/6 compiler. There are a number of codes that have yet to...

Accelerated Computing Guide

Accelerated Computing is a computing model used in scientific and engineering applications whereby calculations are carried out on specialized processors (known as accelerators) in tandem with traditional CPUs to achieve faster real-world execution times. Accelerators are highly specialized microprocessors designed with data parallelism in mind. In the most practical terms,...

T.P. Straatsma

Dr. T. P. Straatsma is the Group Leader for Scientific Computing in the National Center for Computational Sciences, a division that houses the Oak Ridge Leadership Computing Facility, at Oak Ridge National Laboratory, and Adjunct Faculty member in the Chemistry Department of the University of Alabama in Tuscaloosa. He earned his Ph.D. in Mathematics and Natural Sciences from the University of G...

2017 OLCF User Conference Call: Preparing Applications for Summit: NUCCOR

The OLCF hosts monthly User Conference Call. These calls are your opportunity to speak with center personnel to get the latest updates, express any concerns you may have, etc. No registration is required for this event. Monthly Topic:  Preparing Applications for Summit: NUCCOR Speaker:  Micah D. Schuster, Ph.D., ORNL Abstract:  ...

Optimization & Profiling

Optimization Guide for AMD64 Processors AMD offers guidelines specifically for serial code optimization on the AMD Opteron processors. Please see AMD's Developer Documentation site for whitepages and information on the latest generation of AMD processors.

Compiling

Note: For GPU specific compilation details please see the Accelerated Computing Guide. Compiling code on Titan (and other Cray machines) is different than compiling code for commodity or beowulf-style HPC linux clusters. Among the most prominent differences...