TS/CV/DC CFD Team Computational Fluid Dynamics at CERN Michele Battistin CERN, Geneva - Switzerland.
A future for Computational Fluid Dynamic at CERN (?)
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Transcript of A future for Computational Fluid Dynamic at CERN (?)
25th May 2005 – EDMS 591490 1
TS/CV/DC CFD Team
M. Battistin
TS/CV/Detector Cooling - CFD TeamTS workshop
Archamps, France, May 24 – May 26, 2005
Michele Battistin
A future for Computational Fluid Dynamic at CERN (?)
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From fluid dynamics to Computational Fluid Dynamics
• What is CFD
• Industrial and CERN applications
• The CFD service team at CERN
• Opportunities
• What future for this team?
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Computational Fluid Dynamics
Computational Fluid Dynamics (CFD) is an analysis of fluid flow, heat transfer and associated phenomena in physical systems using numerical methods.
The basis of computational fluid dynamics is the reduction of the continuum differential equations describing the dynamics of the fluid (Navier-Stokes + mass and energy conservation equations) into a system of algebraic equations at a finite number of "grid" points, and the solving of the equations at these limited number of points only.
CFD is developing fast in many industry fields
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A wide range of application fields
Aerospace
Automotive
Biomedical
Buildings
Chemical
Environment
Marine
Power gen.
Turbo-machinery …and at CERN?
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CNGS Horn Air Cooling
CFD simulations helped to decide modifications even during the construction phase
Particle energy deposition heats up the horn and its
shielding structure
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CFD for safety too
Cavern floor: where some person could be present
Velocity iso-surfaces
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Alice Muons Detector heat transfer
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Alice ITS: no time for prototypes
At CERN, most of the times, the final system is the prototype.
CFD can provide insight into fluid flow problems when experimental techniques are too expensive or physically impossible.
The Alice, ATLAS and CMS Inner Trackers are good examples.
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SPS magnet LHCb PS/SPD
Who performs these simulations
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…a new team… and its opportunities
A “TEAM”
Identity & Image
Problems
sharingWeb page
Weekly meeting
sQuality
procedures Archivin
g EDMSStandar
d reports
Training problem
s Knowled
ge transfer
Turnover
Books Software versions
Theory
Supplier support
Long term
contracts
Workload
How projects arrive
Efficiency
User or client?
Seminars
Bulletin
Computing
powerParallel calculati
onWeb page
Flyer“advertisin
g”
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Computing power IS the limiting resource of CFD
The Grid will become soon THE natural calculation environment for CFD applications.
CERN CFD team could have the opportunity to run simulations in this environment with an important advance and advantage over the industry!
• LxParc (6 DP machines)
• OpenLab tests
• 20 Itanium 64 bit DP machines cluster
• 20 kCHF to improve ~8 times the calculation speed
• IT could support the implementation of CFD on GRID
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Experience and continuous training
High turnover doesn’t allow knowledge consolidation
Induction training:Technical studentsSpanish & Portuguese programsProject AssociatesDoctoral StudentsFellows
An important competence on this field can be achieved only with a long term training strategy which unfortunately is not compatible with the present nature of contracts of the team members!
In order to maintain at least the CFD framework a dedicated staff position with the mandate of technical coordination of the team is required!
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TS/CV/DC CFD Team
M. Battistin