Numerical characterization of quasi-steady thermal load for thin crystal at cryogenic temperature with nondiffusive heat transfer

2021 ◽  
Vol 130 (14) ◽  
pp. 144503
Author(s):  
Zhengxian Qu ◽  
Yanbao Ma ◽  
Guanqun Zhou ◽  
Juhao Wu
Keyword(s):  
Heat Transfer ◽  
Thermal Load ◽  
Cryogenic Temperature ◽  
Numerical Characterization ◽  
Thin Crystal

Numerical Characterization of Flow and Heat Transfer in Pre-Swirl Systems

2017 ◽  
Author(s):  
Riccardo Da Soghe ◽  
Cosimo Bianchini ◽  
Jacopo D’Errico
Keyword(s):  
Heat Transfer ◽  
Gas Turbines ◽  
Numerical Study ◽  
Physical Phenomenon ◽  
Computational Procedure ◽  
Operating Conditions ◽  
Simulation Techniques ◽  
Numerical Characterization ◽  
Unsteady Simulation

This paper deals with a numerical study aimed at the validation of a computational procedure for the aerothermal characterization of pre-swirl systems employed in axial gas turbines. The numerical campaign focused on an experimental facility which models the flow field inside a direct-flow pre-swirl system. Steady and unsteady simulation techniques were adopted in conjunction with both a standard two-equations RANS/URANS modelling and more advanced approaches such as the Scale-Adaptive-Simulation principle, the SBES and LES. The comparisons between CFD and experiments were done in terms of swirl number development, static and total pressure distributions, receiving holes discharge coefficient and heat transfer on the rotor disc surface. Several operating conditions were accounted for, spanning 0.78·106<Reφ<1.21·106 and 0.123<λt<0.376. Overall the steady-state CFD predictions are in good agreement with the experimental evidences even though it is not able to confidently mimic the experimental swirl and pressure behaviour in some regions. Although the use of unsteady sliding mesh and direct turbulence modelling, would in principle increase the insight in the physical phenomenon, from a design perspective the tradeoff between accuracy and computational costs is not always favourable.

Numerical characterization of heat transfer in closed-loop vertical ground heat exchanger

2010 ◽  
Vol 53 (1) ◽  
pp. 111-116 ◽  
Author(s):  
Chulho Lee ◽  
Hujeong Gil ◽  
Hangseok Choi ◽  
Shin-Hyung Kang
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Closed Loop ◽  
Ground Heat Exchanger ◽  
Numerical Characterization ◽  
Vertical Ground

Experimental and Numerical Characterization of an Electrically Propelled Vehicles Battery Casing Including Battery Module

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
Johan Anderson ◽  
Johan Sjöström ◽  
Petra Andersson ◽  
Francine Amon ◽  
Joakim Albrektsson
Keyword(s):  
Heat Transfer ◽  
Transfer Coefficients ◽  
Power Train ◽  
Fire Model ◽  
Heat Transfer Coefficients ◽  
Fire Resistance Test ◽  
Numerical Characterization ◽  
Computational Fluid Dynamics Cfd ◽  
Battery Module

This paper demonstrates the possibility to predict a battery system's performance in a fire resistance test according to the new amendment of United Nations Regulation No. 100 “Uniform Provisions Concerning the Approval of Vehicles with Regard to Specific Requirements for the Electric Power Train” (R100) based on careful measurements of the physical properties of the casing material, as well as modeling of the battery modules and computer simulations. The methodology of the work consists of estimating the heat transfer coefficients by using a gasoline pool fire model in the computational fluid dynamics (CFD) software FireDynamicsSimulator (FDS), followed by finite-element (FE) calculations of the temperatures in the battery

scholarly journals Experimental and numerical characterization of single-phase pressure drop and heat transfer enhancement in helical corrugated tubes

2021 ◽  
Vol 179 ◽  
pp. 121632
Author(s):  
Gonçalo G. Cruz ◽  
Miguel A.A. Mendes ◽  
Jos M.C. Pereira ◽  
H. Santos ◽  
A. Nikulin ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Heat Transfer Enhancement ◽  
Single Phase ◽  
Transfer Enhancement ◽  
Numerical Characterization ◽  
Phase Pressure

SYNTHESIS AND CHARACTERIZATION OF WATER BASED ZNO AND AG COATED ZNO NANO-FLUIDS FOR HEAT TRANSFER APPLICATIONS

2018 ◽  
Author(s):  
Surendra D. Barewar ◽  
Sandesh S. Chougule ◽  
J. Jadhav ◽  
S. Biswas
Keyword(s):  
Heat Transfer ◽  
Synthesis And Characterization ◽  
Water Based ◽  
Nano Fluids

Flow Structure and Heat Transfer Characterization of a Blunt-Fin-Induced Shock-Wave/Laminar Boundary-Layer Interaction

2021 ◽  
Author(s):  
Jorge Castro Maldonado ◽  
James A. Threadgill ◽  
Stuart A. Craig ◽  
Jesse C. Little ◽  
Stefan H. Wernz
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Shock Wave ◽  
Flow Structure ◽  
Laminar Boundary Layer ◽  
Layer Interaction ◽  
Boundary Layer Interaction
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