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A future for Computational Fluid Dynamic at CERN (?). TS/CV/Detector Cooling - CFD Team TS workshop Archamps, France, May 24 – May 26, 2005 Michele Battistin. From fluid dynamics to Computational Fluid Dynamics. What is CFD Industrial and CERN applications The CFD service team at CERN

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ts cv detector cooling cfd team ts workshop archamps france may 24 may 26 2005 michele battistin

A future for Computational Fluid Dynamic at CERN (?)

TS/CV/Detector Cooling - CFD TeamTS workshopArchamps, France, May 24 – May 26, 2005Michele Battistin

25th May 2005 – EDMS 591490

from fluid dynamics to computational fluid dynamics
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?

25th May 2005 – EDMS 591490

computational fluid dynamics
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

25th May 2005 – EDMS 591490

a wide range of application fields
A wide range of application fields

Aerospace

Automotive

Biomedical

Buildings

Chemical

Environment

Marine

Power gen.

…and at CERN?

Turbo-machinery

25th May 2005 – EDMS 591490

cngs horn air cooling
CNGS Horn Air Cooling

Particle energy deposition heats up the horn and its shielding structure

CFD simulations helped to decide modifications even during the construction phase

25th May 2005 – EDMS 591490

cfd for safety too
CFD for safety too

Cavern floor: where some person could be present

Velocity iso-surfaces

25th May 2005 – EDMS 591490

alice muons detector heat transfer
Alice Muons Detector heat transfer

25th May 2005 – EDMS 591490

alice its no time for prototypes
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.

25th May 2005 – EDMS 591490

slide10

LHCb PS/SPD

SPS magnet

Who performs these simulations

25th May 2005 – EDMS 591490

a new team and its opportunities

Software versions

Parallel calculation

Computing power

Web page

A “TEAM”

Identity & Image

Problems sharing

Web page

Weekly meetings

Archiving EDMS

Standard reports

Knowledge transfer

Training problems

Books

Flyer

Theory

Supplier support

Long term contracts

Workload

How projects arrive

Efficiency

User or client?

Seminars

Bulletin

Turnover

Quality procedures

“advertising”

…a new team… and its opportunities

25th May 2005 – EDMS 591490

computing power is the limiting resource of cfd
Computing power IS the limiting resource of CFD
  • 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

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!

25th May 2005 – EDMS 591490

experience and continuous training

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!

Experience and continuous training

High turnover doesn’t allow knowledge consolidationInduction training: Technical students Spanish & Portuguese programs Project Associates Doctoral Students Fellows

25th May 2005 – EDMS 591490