by Dan Hughes
From time to time I mention that based on our results at Camp NRTS, Lance, through EPRI, supported research at other organizations.
One of the significant aspects relative to formulations of the basic model equations was the work by Jim Stuhmiller at Jaycor. Jim’s 1977 publication:
The influence of interfacial pressure forces on the character of two-phase flow model equations International Journal of Multiphase Flow, Vol. 3, pp. 551-560, 1977,
has been cited more than 260 times.
The two-pressure modeling approach was again taken up in the early-1980s at Camp NRTS: early in the RELAP5 work, and again in the later 1980s.
And most recently the two-pressure model formulations have been accepted as the bases for the RELAP7 effort. ( For some reason that search doesn’t find the latest report on the 1-D model formulation. )
Jim and co-workers, with fundling by Lance through EPRI, were also among the first to be successful in development and applications of 3-D models and codes. The Jaycor models and codes have enjoyed a long life in analyses of the conditions on the secondary side of nuclear power plant steam generators.
Jim and Jaycor ere also among the first to consider development of a model for evolution of the structure of two-phase flows, the Dynamic Flow Regime Model (DFRM);
J.H. Stuhmiller, R.E. Ferguson, S.S. Wang, and L.J. Agee, Two-phase flow regime modeling in M.S. Plesset, N. Zuber and I. Catton (Editors), Specialist Meeting on Transient Two-phase Flow, Pasadena, CA, 23-25 March 1981, pp. 353-368, Hemisphere Publishing, New York, 1983.
There’s also a EPRI Report, but I not been successful in getting The Google Scholar to find it. One application was for modeling Critical Heat Flux (CHF), EPRI Report EPRI-TR-103188, 1993.
Lance was very frequently on the leading edge of models, methods, and software for Thermal Hydraulic applications for nuclear power production. In many regards the various foundations laid at Camp NRTS, like these and several others, continue to be areas of active research.