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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-483-0

ISBN Online: 978-1-56700-482-3

4th Thermal and Fluids Engineering Conference
April, 14–17, 2019 , Las Vegas, NV, USA

NATURAL AND MIXED CONVECTION IN RECTANGULAR ENCLOSURES AND CHANNELS CONTAINING LIQUID METALS AND PARTITION WALLS

Get access (open in a dialog) pages 1103-1106
DOI: 10.1615/TFEC2019.fnd.028098

Resumo

Natural and mixed convection generated transient velocity and temperature fields in rectangular three dimensional enclosures and channels containing liquid metal (lead-bismuth) and solid partitions (steel) were numerically predicted with computational fluid dynamics model based on a finite volume method. The results were compared with the previously obtained results for idealized two dimensional models in the symmetry planes. The developed model takes into account variable properties of the liquid metal and conjugated heat transfer in enclosures and channels with solid partitions between them. The ranges of considered Rayleigh and Prandtl numbers is 5500 < Ra < 2.9*107 and 0.011 < Pr < 0.016, respectively. The inlet velocities and fluid properties in the straight rectangular channels were kept comparable to the ones generated by natural convection in enclosures and resulted in a Reynolds numbers range of 1300 < Re < 3300. With increased Rayleigh numbers, the transitions from laminar to oscillatory and finally to turbulent flow regime were observed.