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As evidenced by the number software tools available commercially today, Computational Fluid Dynamics (CFD) is widely employed in the design and management of data centers and has become a vitally important technology in the quest to make these complex and energy-intensive facilities more reliable and energy efficient. In the second part of this two-part seminar, we look at recent advancements in CFD modeling technology for data center applications.

Experimental Validation Of Data Center Rack Models
John Zhai, Ph.D., Member, Knud Hermansen, Saleh Al-Saadi
Modeling a computer rack as a black box has been done in numerous data center studies, but rarely has it been validated against experimental temperature and velocity data. The paper investigates two simplified rack models for computational fluid dynamics (CFD) and compares them against physical experiments conducted in a mock-up lab with a rack simulator. The study finds that both the black box and open box models are simple and effective at representing the temperature distribution created by a single rack. Average agreements between simulations and experiments were found to be within 3°C and 0.2 m/s over all experiments.
Recorded Presentation Audio (mp3) Slides (pdf) Recorded Presentation (mp4)

An Enhanced Potential Flow Model For Data Center Applications
James VanGilder, P.E., Member, Xuanhang (Simon) Zhang, Member, Christopher M. Healey, Ph.D.
Potential flow modeling (PFM) is a simplified form of CFD that trades the ability to model certain physical effects for great improvements in speed and robustness. PFM technology has the potential to drive the practical use of CFD tools for data center design and management and could be utilized even more broadly if there were a way to account for some of the “missing physical effects” inherent to the approach with buoyancy being, by far, the most important. This presentation describes a new semi-empirical model for including, the effects of buoyancy in PFM for data center applications.
Recorded Presentation Audio (mp3) Slides (pdf) Recorded Presentation (mp4)

A Hybrid CFD/Lumped-Capacitance Model For Simulating Data Center Transients
H. Ezzat Khalifa, Ph.D., Fellow ASHRAE, Hamza Erden
Product contains: Recorded Presentation Audio (mp3), Slides (pdf), Recorded Presentation (mp4)