One equation subgrid model for liquid metal forced convection
Based on one equation subgrid model for the velocity field and temperature and velocity spectra of the unresolved scales an one equation subgrid model for liquid metal forced convection is derived. The model provides an estimate for subgrid turbulent Prandtl number (PrSGS) which accounts for effects of molecular fluid properties on the energy transfer. The method was assessed by performing large eddy simulations (LES) of forced convection in a channel at friction velocity-based Reynolds numbers 390 and 599, for Prandtl numbers 1 and 0.022. Influence of spatial resolution and effects introduced by variation of PrSGS on simulation results are analyzed. The simulation results are compared with the experimental and direct numerical simulation results available from the literature. The LES results appears to be very insensitive on variations of the PrSGS magnitude, provided the velocity field is well approximated. These results suggest that this simple estimate of PrSGS may be sufficient for engineering large eddy simulations of liquid metal forced convection.
Thermalhydraulics Liquid metal flows LES
Ivan Oti?
Karlsruhe Institute of Technology Institute for Fusion and Reactor Technologies Kaiserstrasse 12, 76131 Karlsruhe, Germany
国际会议
上海
英文
780-792
2010-10-10(万方平台首次上网日期,不代表论文的发表时间)