ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nuclear Science and Engineering
September 2024
Nuclear Technology
August 2024
Fusion Science and Technology
Latest News
Taking shape: Fusion energy ecosystems built with public-private partnerships
It’s possible to describe fusion in simple terms: heat and squeeze small atoms to get abundant clean energy. But there’s nothing simple about getting fusion ready for the grid.
Private developers, national lab and university researchers, suppliers, and end users working toward that goal are developing a range of complex technologies to reach fusion temperatures and pressures, confounded by science and technology gaps linked to plasma behavior; materials, diagnostics, and electronics for extreme environments; fuel cycle sustainability; and economics.
Antti Timperi
Nuclear Technology | Volume 204 | Number 1 | October 2018 | Pages 25-40
Technical Paper | doi.org/10.1080/00295450.2018.1461518
Articles are hosted by Taylor and Francis Online.
Large-eddy simulations (LESs) for two different T-junctions are performed for the prediction of thermal mixing loads on piping. In particular, the effects of wall treatment and mesh on temperature and wall heat flux fluctuations are studied. Wall-resolved LES shows good agreement with an experiment having adiabatic walls, but using wall functions shows deviations in root-mean-squared (RMS) temperatures and cross-stream mean velocities. The simulations show increases in peak RMS temperatures with local mesh refinement, and hence, too-low peak values are obtained with wall functions. The highest temperature fluctuations occur locally near the T-junction requiring a dense mesh. Wall functions are unable to capture high wall heat fluxes at a sharp corner, but otherwise, the maximum RMS value is close to a wall-resolved LES. For a T-junction having a round corner, higher RMS heat flux is obtained with wall functions compared to a wall-resolved case. Wall functions show lower instantaneous heat fluxes than wall-resolved LES, but the wall functions nonetheless result in higher pipe wall temperature fluctuations due to lower frequency content.