Flow and Heat Transfer Characteristics of Low Flow Resistance Surface

2012 ◽  
Vol 48 (08) ◽  
pp. 128 ◽  
Author(s):  
Xiaoming GAO
Keyword(s):  
Heat Transfer ◽  
Flow Resistance ◽  
Low Flow ◽  
Heat Transfer Characteristics ◽  
Resistance Surface ◽  
Transfer Characteristics ◽  
Flow And Heat Transfer

Flow and Heat Transfer Characteristics of Urban Original Sewage

2012 ◽  
Vol 461 ◽  
pp. 44-47
Author(s):  
Cheng Hu Zhang ◽  
Qing Ting Du ◽  
De Xing Sun
Keyword(s):  
Heat Transfer ◽  
Rheological Property ◽  
Heat Transfer Characteristic ◽  
Flow Resistance ◽  
Physical Property ◽  
Transfer Characteristic ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Flow And Heat Transfer

This paper introduces rheological property, thermo physical property, flow resistance and heat transfer characteristic of urban original sewage and the calculation thinking and method.

scholarly journals Uncertainties Analysis on the Prediction of Flow and Heat Transfer of Liquid Sodium with CFD Technology

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhanwei Liu ◽  
Xinyu Li ◽  
Tenglong Cong ◽  
Rui Zhang ◽  
Lingyun Zheng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Friction Coefficient ◽  
Liquid Sodium ◽  
Heat Transfer Characteristics ◽  
Backward Facing Step ◽  
Heating Wall ◽  
Transfer Characteristics ◽  
Cfd Models ◽  
Flow And Heat Transfer

The prediction of flow and heat transfer characteristics of liquid sodium with CFD technology is of significant importance for the design and safety analysis of sodium-cooled fast reactor. The accuracies and uncertainties of the CFD models should be evaluated to improve the confidence of the numerical results. In this work, the uncertainties from the turbulent model, boundary conditions, and physical properties for the flow and heat transfer of liquid sodium were evaluated against the experimental data. The results of uncertainty quantization show that the maximum uncertainties of the Nusselt number and friction coefficient occurred in the transition zone from the inlet to the fully developed region in the circular tube, while they occurred near the reattachment point in the backward-facing step. Furthermore, in backward-facing step flow, the maximum uncertainty of temperature migrated from the heating wall to the geometric center of the channel, while the maximum uncertainty of velocity occurred near the vortex zone. The results of sensitivity analysis illustrate that the Nusselt number was negatively correlated with the thermal conductivity and turbulent Prandtl number, while the friction coefficient was positively correlated with the density and Von Karman constant. This work can be a reference to evaluate the accuracy of the standard k-ε model in predicting the flow and heat transfer characteristics of liquid sodium.

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