Numerical study on the thermal stratification characteristics in the upper plenum of sodium-cooled fast reactor (SFR)

Wang, Mingjun; Chen, Jing; Zhang, Jing; Tian, Wenxi; Su, G.H.; Qiu, Suizheng

doi:10.1016/j.anucene.2019.107222

Cited by 24 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, they outlined the optimal flow parameters for the viscous drag in the thermally stratified flow in the pool. Wang et al [27] described the characteristics of thermal stratification by numerical simulation for the thermal dynamics of the energy transportation in the upper plenum of the sodium-cooled fast reactor (SFR), having an excellent agreement with the experimental data.…”

mentioning

confidence: 86%

Entropy and multiphysics analysis in a viscous dissipative non-Darcian porous enclosure

2021

View full text Add to dashboard Cite

The present article assessed the mathematical model for the entropy generation in free convective heat and mass transfer phenomenon in the thermal and species stratified fluid-saturated non-Darcy porous domain. In this model, the viscous dissipation forces are assumed significant. Moreover, the physical model is exposed to the magnetic forces to accommodate the control over the stratification forces. For a better understanding of the temperature and concentration field, the heat function (H ) and mass function (M) models for the multi-force effect on porous media flow, are proposed in this study by which the directional flow accompanying magnitudes of heat flux and mass flux can be visually manifested. To solve the mathematical model numerically, the finite element method is implemented on the dimensionless form of the governing nonlinear partial differential equations. The obtained results are portrayed by of the streamline, isotherm, isoconcentration contours, and cumulative Nusselt and Sherwood number plots for the parameters associated with the problem with additional heatline and massline contour visuals. Moreover, the thermodynamical attributes of fluid flow are illustrated by the contour plots of the entropy production due to fluid friction, heat transfer, mass transfer, and total entropy. Besides, the other characteristics are delineated by the Bejan number plots for the study of thermodynamic irreversibilities. Here, it is observed that the intensification of thermal buoyancy forces raises the stratification levels in the fluid flow. The high intensity of stratification forces introduces the contra-rotating pair of fluid flow movements. On the other hand, horizontally applied magnetic forces significantly restrict the convective flow of heat and mass fluxes, resulting in a massive drop of entropy generation by viscous dissipation. NomenclatureB Buoyancy ratio Be Bejan Number C Non-dimensional species concentration c Dimensional species concentration c p Specific heat at constant temperature c s Concentration susceptibility a e-mails:

show abstract

mentioning

confidence: 86%

Entropy and multiphysics analysis in a viscous dissipative non-Darcian porous enclosure

2021

View full text Add to dashboard Cite

show abstract

“…Vanderhaegen et al (Qin et al, 2019) modeled the core and hot pool of MYRRHA, and the fuel bundles, heat exchangers, and pumps were simplified with the porous-medium model. Similarly, Wang et al (Wang et al, 2020) contributed a full-scale numerical model based on the porous-medium model for the Monju reactor (SFR). Steady-state and transient analyses on the thermal-stratification phenomenon in the upper plenum were performed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Thermal Hydraulic Characteristics in a Wire-Wrapped Assembly of LFRs

Fang

Guo

et al. 2020

Front. Energy Res.

Self Cite

View full text Add to dashboard Cite

The concept of wire-wrapped assembly has been widely adopted in liquid metal-cooled reactors to enhance the capability of flow and heat transfer. The detailed 3D thermal hydraulic behaviors of liquid metal in the wire-wrapped assembly directly affect the safety of the reactor. In the present work, a numerical study on a 19-pin wire-wrapped assembly cooled by a lead-bismuth eutectic was carried out using the CFD method. The geometrical model is referred to in the test section in KIT’s 19-pin experiments, which is a scaled test assembly based on the MYRRHA reactor. The established CFD model was validated against experimental data and results showed that the SST k-ω model accompanied with the modified Prt was appropriate for the current problem. Then the numerical models were extensively used in the modeling of the blocked assembly flow with a cylindrical blockage. Also, the influences of blockage longitude, position, and porosity on the thermal hydraulic characteristics in the assembly were evaluated in detail. This work is meaningful for the deep understanding of safety features under the condition of assembly blockage operation in LFRs.

show abstract

Large eddy simulation on the mixing characteristics of liquid sodium at the core outlet of sodium cooled fast reactors (SFR)

Wang

Zhang

et al. 2021

Annals of Nuclear Energy

View full text Add to dashboard Cite

Numerical study on the thermal stratification characteristics in the upper plenum of sodium-cooled fast reactor (SFR)

Cited by 24 publications

References 11 publications

Entropy and multiphysics analysis in a viscous dissipative non-Darcian porous enclosure

Entropy and multiphysics analysis in a viscous dissipative non-Darcian porous enclosure

Numerical Study on the Thermal Hydraulic Characteristics in a Wire-Wrapped Assembly of LFRs

Large eddy simulation on the mixing characteristics of liquid sodium at the core outlet of sodium cooled fast reactors (SFR)

Contact Info

Product

Resources

About