Providing high resolution data for development of computational tools that model fluid flow and heat transfer within complex systems such as the core of a nuclear reactor.
Simulation vs. Reality
Analysts simulate flows using high-performance computational fluid dynamics (CFD) tools. Results are compared to experimental data to verify accuracy.
Experimentalists measure flows using a collection of high-resolution instruments: a laser illuminates particles suspended in air jets for imaging by a high-speed camera to measure turbulence. An infrared camera measures temperatures where hot and cold jets impact the lid.
Fiber optic distributed temperature sensor
Who is Right?
Simulation tools are becoming ever more powerful, sometimes even revealing phenomena that remain beyond the reach of instruments.
Experiments, on the other hand, always harbor uncertainties. And advanced instruments often generate “real” data using abstract models akin to those in CFD codes.
Both are tools for examining the physical world. Which is closer to the “truth,” that is, to nature? In code validation, the answer can be unexpected.
- NEAMS CFD Code Validation with the MAX Fluid Dynamics Facility, brochure [2.2MB]
- S. Lomperski, C. Gerardi, and W.D. Pointer (2015) Fiber optic distributed temperature sensor mapping of a jet-mixing flow field, Experiments in Fluids, 56:55.
- S. Lomperski and C. Gerardi (2014) Assessment of distributed fiber optic sensors for flow field temperature mapping, Proc. ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 12th International Conference on Nanochannels, Microchannels, and Minichannels FEDSM2014 August 3-7, Chicago.
- S. Lomperski, C. Gerardi, and W.D. Pointer (2013) Distributed fiber optic temperature sensing for CFD code validation, The 15th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH-15, Pisa, Italy May 12-17 2013.
- S. Lomperski, E. Merzari, A. Obabko, W.D. Pointer, P. Fischer (2012) The MAX facility for CFD code validation, Proceedings of ICAPP’12, Chicago, USA June 24-28, paper 120060.
- S. Lomperski, C. Gerardi, W.D. Pointer, PIV accuracy and extending the field of view for validation of multi-scale CFD tools, Advances in Thermal Hydraulics (ATH’12), November 11-15, San Diego, CA.
- W. David Pointer, S. Lomperski, P. Fischer, and A. Obabko, Proposed experiment for validation of CFD methods for advanced SFR design: upper plenum thermal striping and stratification, Proceedings of ICONE17, July 12-16, 2009, Brussels, Belgium.
OTHER PHOTOS: The MAX Facility at Argonne National Laboratory - Flickr Gallery
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Last Modified: Thu, April 21, 2016 5:25 AM