1. Computational Fluid Dynamic at CERN
DSFD Conference – CERN visit August 25th 2006 Bdg h00 Sara Eicher, Michele Battistin
S. Eicher, M. Battistin
25th August 2006

2. CFD activity at CERN 1993: first technical student
2004: CFD team was created (3-6 elements)
Software:
StarCD® software (10 suites calculation licenses)
Flotherm®
CERN Openlab access (20 Itanium2 + Infiniband)
Applications on main LHC Experiments
Ventilation, heat transfer, natural convection
A future more and more dependent on CPU availability
Some examples…
S. Eicher, M. Battistin
25th August 2006

3. Alice Muons Detector heat transfer
3D 400 kcells transient 2 months calculation
S. Eicher, M. Battistin
25th August 2006

4. Inner Tracker of Experiments
Is the maximum temperature compatible with the silicon detectors? CFD can provide insight into thermal and fluid flow problems when experimental techniques are too expensive or physically impossible. The Alice, ATLAS and CMS Inner Trackers are good examples.
S. Eicher, M. Battistin
25th August 2006

5. ATLAS cavern temperature map
Animation
2D 250 kcells transient 1 week
S. Eicher, M. Battistin
25th August 2006

6. Recent evolution on ATLAS cavern
3D directly imported from Catia CAD 3 Millions cells transient running
S. Eicher, M. Battistin
25th August 2006

7. S. Eicher, M. Battistin
25th August 2006

8. 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
S. Eicher, M. Battistin
25th August 2006

9. CFD for safety too Cavern floor: where some person could be present
Velocity iso-surfaces
CFD for safety too
S. Eicher, M. Battistin
25th August 2006

10. LHCb PS/SPD
SPS magnet
S. Eicher, M. Battistin
25th August 2006

11. Thanks for your attention
…to sum up
History of CFD at CERN
Software used (StarCD and Flotherm)
CERN Openlab cluster
Clients…
Applications…
Thanks for your attention
S. Eicher, M. Battistin
25th August 2006