ylfink@water.waterloo.edu (ylfink) (09/12/88)
DEPARTMENT OF COMPUTER SCIENCE UNIVERSITY OF WATERLOO SEMINAR ACTIVITIES SCIENTIFIC COMPUTATION SEMINAR - Thursday, September 15, 1988 Dr. Michael B. Carver, Thermalhydraulics Development Branch, Atomic Energy of Canada, will speak on ``Thermalhydraulic Code Development at CRNL''. TIME: 4:00 PM ROOM: DC 1304 NOTE NEW ROOM ABSTRACT As a nuclear reactor relies entirely on fluid circuits for energy transfer and transport, modelling thermalhydraulic behaviour plays a pivotal role in reactor design and development, and methods of improving the accuracy and efficiency of thermalhydraulic computations are sought continually. The presentation describes a rational approach to successful development and application of thermalhydraulic computer codes. The basic two-fluid conservation equations are introduced, and various models of two-phase flow are also mentioned together with the auxiliary constitutive relationships required for closure of the equation set. Codes are grouped broadly into two classifications, system codes and component codes. The former attempt to model all components in a reactor circuit including associated thermalhydraulic communicating structures, and, because of this diversity, are usually restricted to one dimension. The latter attempt to model particular components in a more detailed manner and are usually multi-dimensional. The talk will dwell primarily on specialized and component codes and present sample applications and conclude with a look at some of the current concerns and uncertainties in development of such codes.