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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
Mong J. Yu, Chan S. Kim, Kune Y. Suh
Nuclear Technology | Volume 157 | Number 3 | March 2007 | Pages 261-276
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT07-A3817
Articles are hosted by Taylor and Francis Online.
Quenching experiments were performed to examine the effect of inclination angles and curvature on film-boiling heat transfer. The experiments employed a 294-mm-diam, 30-mm-thick stainless steel downward-facing hemisphere to substantiate the local film-boiling mechanism along the angular surface. Forty-six thermocouples were installed from 0 deg (the bottom) to 85 deg (near the equator) at three intervals: 10 deg (0 to 10 deg), 5 deg (10 to 55 deg), and 2.5 deg (55 to 85 deg) near the outer (1.5 mm) and inner (5 mm) surfaces of the test section. The angular film-boiling heat fluxes and heat transfer coefficients were obtained from the two-dimensional transient temperature profiles by solving a transient heat conduction equation in spherical coordinates. The test results were compared with those of the laminar and interfacial wavy film-boiling analysis. Undulating heat transfer coefficients were observed from the experimental data as the angle increases. These phenomena intensified near the equator, which has higher inclination angles than near the bottom. It was shown that the Helmholtz instability limited the vapor film thickness. In addition, the boiling mechanism on the downward-facing hemisphere was visualized utilizing a digital camera.