scholarly journals STUDY OF TURBULENT FLOW IN A POROUS TUBE WITH HIGH MASS FLUX TO AND FROM THE WALL

1972 ◽  
Vol 5 (4) ◽  
pp. 361-364 ◽  
Author(s):  
TOKURO MIZUSHINA ◽  
SHUNJI TAKESHITA ◽  
JUNJI YOSHIZAWA ◽  
ISAO NAKAMAE
Keyword(s):  
Turbulent Flow ◽  
Mass Flux ◽  
High Mass ◽  
Porous Tube

scholarly journals High mass flux mass transfer through a mobile interface.

1980 ◽  
Vol 13 (5) ◽  
pp. 354-360 ◽  
Author(s):  
AKIRA HIRATA ◽  
YOSHIZO SUZUKI
Keyword(s):  
Mass Transfer ◽  
Mass Flux ◽  
High Mass ◽  
Mobile Interface

scholarly journals HEAT TRANSFER FOR TURBULENT FLOW WITH INJECTION IN A POROUS TUBE

1977 ◽  
Vol 10 (6) ◽  
pp. 428-434
Author(s):  
TOKURO MIZUSHINA ◽  
FUMIMARU OGINO ◽  
TADASHI FUKUDA
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Porous Tube

Three Boiling Instability Modes in Silicon Microchannels

2003 ◽  
Author(s):  
H. Y. Wu ◽  
Ping Cheng
Keyword(s):  
Heat Flux ◽  
Mass Flux ◽  
High Mass ◽  
Flow Mode ◽  
High Heat Flux ◽  
Pressure Oscillations ◽  
Two Phase ◽  
Experimental Conditions ◽  
Instability Modes ◽  
Temperature And Pressure

Depending on the heat flux, mass flux, and subcooling of inlet water, three boiling instability modes in silicon microchannels are possible. These are: the LTAF (Liquid/Two-phase Alternating Flow) mode, the CTF (Continuous Two-phase Flow) mode, and the LTVAF (Liquid/Two-phase/Vapor Alternating Flow) mode. It is found that the LTAF mode occurs at low heat flux and high mass flux, and has medium-amplitude temperature and pressure oscillations. The CTF mode appears at the medium heat flux and medium mass flux, and has small-amplitude temperature and pressure oscillations. The LTVAF mode appears at high heat flux and low mass flux, and has large-amplitude temperature and pressure oscillations. During the two-phase period of the LTAF mode, bubbly flow is found to be the dominant flow pattern. Some peculiar flow patterns are observed during the two-phase period of CTF and LTVAF modes under the experimental conditions.

Steady State Film Boiling Heat Transfer Simulated With TRACE V4.160

2006 ◽  
Author(s):  
Audrius Jasiulevicius ◽  
Rafael Macian-Juan
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Mass Flux ◽  
Boiling Heat Transfer ◽  
High Mass ◽  
Film Boiling ◽  
Experimental Database ◽  
Boiling Heat Transfer Coefficient

This paper presents the results of the assessment and analysis of TRACE v4.160 heat transfer predictions in the post-CHF (critical heat flux) region and discusses the possibilities to improve the TRACE v4.160 code predictions in the film boiling heat transfer when applying different film boiling correlations. For this purpose, the TRACE v4.160-calculated film boiling heat flux and the resulting maximum inner wall temperatures during film boiling in single tubes were compared with experimental data obtained at the Royal Institute of Technology (KTH) in Stockholm, Sweden. The experimental database included measurements for pressures ranging from 30 to 200 bar and coolant mass fluxes from 500 to 3000 kg/m2s. It was found that TRACE v4.160 does not produce correct predictions of the film boiling heat flux, and consequently of the maximum inner wall temperature in the test section, under the wide range of conditions documented in the KTH experiments. In particular, it was found that the standard TRACE v4.160 underpredicts the film boiling heat transfer coefficient at low pressure-low mass flux and high pressure-high mass flux conditions. For most of the rest of the investigated range of parameters, TRACE v4.160 overpredicts the film boiling heat transfer coefficient, which can lead to non-conservative predictions in applications to nuclear power plant analyses. Since no satisfactory agreement with the experimental database was obtained with the standard TRACE v4.160 film boiling heat transfer correlations, we have added seven film boiling correlations to TRACE v4.160 in order to investigate the possibility to improve the code predictions for the conditions similar to the KTH tests. The film boiling correlations were selected among the most commonly used film boiling correlations found in the open literature, namely Groeneveld 5.7, Bishop (2 correlations), Tong, Konkov, Miropolskii and Groeneveld-Delorme correlations. The only correlation among the investigated, which resulted in a significant improvement of TRACE predictions, was the Groeneveld 5.7. It was found, that replacing the current film boiling correlation (Dougall-Rohsenow) for the wall-togas heat transfer with Groeneveld 5.7 improves the code predictions for the film boiling heat transfer at high qualities in single tubes in the entire range of pressure and coolant mass flux considered.

The SDS and steel surface interaction behaviour in case of high mass flux spray cooling from very high temperature

2019 ◽  
Vol 157 ◽  
pp. 508-517
Author(s):  
Lily Das ◽  
B. Swain ◽  
B. Munshi ◽  
S.S. Mohapatra ◽  
A. Behera
Keyword(s):  
High Temperature ◽  
Mass Flux ◽  
Steel Surface ◽  
Spray Cooling ◽  
Surface Interaction ◽  
High Mass ◽  
Very High
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