dc.contributor.author Niemand, P.F. dc.contributor.author Du Toit, C.G. dc.date.accessioned 2020-03-12T12:25:52Z dc.date.available 2020-03-12T12:25:52Z dc.date.issued 2018 dc.identifier.citation Niemand, P.F. & Du Toit, C.G. 2018. Investigation of 1D system CFD and 3D CFD numerical methodology applied to an experimental facility. Proceedings of the 11th South African Conference on Computational and Applied Mechanics (SACAM 2018), 17-19 Sep, Vanderbijlpark, South Africa. [https://www.vut.ac.za/wp-content/uploads/2017/08/Draft-SACAM-Book-of-abstracts-.pdf] en_US dc.identifier.isbn 9781510892095 dc.identifier.uri http://hdl.handle.net/10394/34341 dc.identifier.uri https://www.vut.ac.za/wp-content/uploads/2017/08/Draft-SACAM-Book-of-abstracts-.pdf dc.description.abstract The fourth generation gas-cooled nuclear reactor designs provide a promising prospect for energy and process en_US heat generation. The designs cycles have high thermal efficiencies, require relatively little fuel and are safe to operate. The process of fission does not emit carbon dioxide therefore not adding more greenhouse gases to the atmosphere. Nuclear power stations are subject to strict regulations and safety standards since an accident could have severe consequences. The regulations stipulate, amongst other things, that the nuclear systems behaviour must be able to be predicted under all conditions. To this end, the computational methods used to predict the behaviour must be verified and validated. The phenomena in a nuclear reactor can be very complex and computationally expensive to model, especially when using a 3D CFD approach. The use of 1D system CFD can be employed with improvements in computational time, but with limitations in terms of detail. 1D methodology must therefore be verified and validated against 3D methodologies and experiments to ensure that all of the relevant phenomena are accounted for. The reactor cavity cooling system experimental facility at the University of Wisconsin was simulated by using a combination of 1D methodology by using Flownex SE and 3D methodologies by using ANSYS Fluent. The facility is a scale model of the reactor cavity cooling system (RCCS) of a modular high temperature gas cooled reactor (MHTGR). The RCCS operates solely on buoyancy forces, making it independent of both operator input and power source. The buoyancy driven flow also required the proper correlations be used when numerically simulating the phenomena. The coolant loop consists of a pipe network, which is fed from a tank, that passes through a heated cavity (the latter emulates the reactor cavity). Various levels of heat were added during experiments at the heated cavity, simulating various conditions that could occur in a full scale prototype. The experimental conditions were used as boundary conditions in the CFD/system CFD simulations and the results were compared. The heated cavity and the water tank necessitated the use of 3D CFD methodologies, while a 1D approach was used in the other parts of the system. The numerical results obtained by simulation compare well with the experimental results dc.language.iso en en_US dc.publisher SAAM en_US dc.subject Natural circulation en_US dc.subject Mixed convection en_US dc.subject 1D system CFD en_US dc.subject Reactor cavity cooling system en_US dc.subject Experimental facility en_US dc.title Investigation of 1D system CFD and 3D CFD numerical methodology applied to an experimental facility en_US dc.type Presentation en_US dc.contributor.researchID 10184600 - Du Toit, Charl Gabriel De Kock dc.contributor.researchID 22134530 - Niemand, Peter Francke
﻿

Files in this item

FilesSizeFormatView

There are no files associated with this item.

Theme by