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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/35451
Record Status
Checked
Record Id
35451
Title
Large Scale Electronic Structure Calculations in the Study of the Condensed Phase
Contributors
HJJ van Dam (STFC)
,
MF Guest (STFC)
,
P Sherwood (STFC)
,
JMH Thomas (STFC)
,
JH van Lenthe (Utrecht University)
,
JNJ van Lingen (Utrecht University)
,
CL Bailey (STFC)
,
IJ Bush (STFC)
Abstract
We consider the role that large-scale electronic structure computations can now play in the modelling of the condensed phase. To structure our analysis, we consider four distinct ways in which today's scientific targets can be re-scoped to take advantage of advances in computing resources: 1. Time to solution - performing the same calculation, with delivery of the simulation in shorter elapsed time; 2. Size - applying today's methods to a more extensive problem; 3. Accuracy - replacing current physical models with more accurate ones. 4. Sampling - simultaneously studying more chemical or conformational states. Each of these offer some scientific rewards, but all present technological challenges and it is likely that a mixture of approaches will be needed to make the best use of capability computing. We discuss some aspects of our work in each of these areas, including replicated and distributed data parallel implementations of GAMESS-UK, and approaches incorporating multi-level parallelism. Examples of the latter include pathway optimization using replica methods and task farming approaches to global optimization problems. We consider a typical application of GAMESS-UK to heterogeneous catalysis, and the role that large-scale DFT vibrational frequency calculations have played in the study of partial oxidation catalysts incorporating supported VOx species.
Organisation
CCLRC
,
CSE
,
CSE-CCG
,
CSE-CMSG
,
CSE-HEC
Keywords
Chemistry
,
parallel computing
,
GAMESS-UK
,
QM methods
,
QM/MM methods
,
DFT
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Mol Struct (Theochem)
771 (2006): 33-41. Is in proceedings of: World Association of Theoretical and Computational Chemists 2005 (WATOC'05), Cape Town, 16-21 Jan 2005.
doi:10.1016/j.theochem.2006.04.040
2006
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