scholarly journals RELAP5/MOD3 code quality assurance plan for ORNL ANS narrow channel flow and heat transfer correlations

1992 ◽  
Author(s):  
C.S. MIller ◽  
R.W. Shumway
Keyword(s):  
Heat Transfer ◽  
Quality Assurance ◽  
Channel Flow ◽  
Narrow Channel ◽  
Flow And Heat Transfer ◽  
Heat Transfer Correlations ◽  
Code Quality

Mathematical Modeling of Transient Flow and Heat Transfer in Gas Stirred Molten Steel

2001 ◽  
Author(s):  
J. L. Xia ◽  
T. Ahokainen
Keyword(s):  
Heat Transfer ◽  
Molten Steel ◽  
Thermal Stratification ◽  
Transient Flow ◽  
Liquid Interface ◽  
Turbulent Dispersion ◽  
Steel Ladle ◽  
Bubble Liquid ◽  
Flow And Heat Transfer ◽  
Heat Transfer Correlations

Abstract Transient two phase flow and heat transfer in a gas-stirred steel ladle are numerically investigated. An Eulerian two fluid approach is used. The drag, lift and turbulent dispersion forces are taken into account for the interface interactions. Different interface heat transfer correlations such as Ranz-Marshall and Hughmark relations are used to examine the influence of heat transfer between gas-liquid interface on the flow. The flow pattern, the histories of both gas and molten steel temperatures, and the thermal stratification history are presented. Results show that gas injection can homogenize thermal field and result in a thermal stratification of about 2 °C only (not complete homogenization). The different heat transfer correlations examined for the bubble-liquid interface have negligible impact on the flow and thermal fields. Predictions are compared with experimental data measured in an industrial ladle and a reasonable agreement is achieved.

Laminar flow and heat transfer in confined channel flow past square bars arranged side by side

2002 ◽  
Vol 39 (8-9) ◽  
pp. 721-728 ◽  
Author(s):  
Alvaro Valencia ◽  
Ronald Paredes
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Channel Flow ◽  
Flow And Heat Transfer ◽  
Flow Past ◽  
Confined Channel

Modeling and Numerical Simulation of Gaseous Flows in Micro Geometries

2003 ◽  
Author(s):  
Hong Xue
Keyword(s):  
Heat Transfer ◽  
Channel Flow ◽  
Transition Flow ◽  
Gaseous Flow ◽  
Rarefied Flow ◽  
Flow And Heat Transfer ◽  
Transition Flow Regime ◽  
Gaseous Flows ◽  
Micro Flow ◽  
Mechanical Devices

In this paper, our recent work in studying gaseous flow and heat transfer in micro geometries are summarized. Both continuum-based approaches and DSMC method is used to predict characteristics of micro flow in slip and transition flow regime. A new analytic solution for micro channel flow is proposed. The results in micro Couette flow, channel flow and backward facing step flow show that the rarefied flow in micro geometries exhibit unique and complicated behaviors. Our efforts in exploring the flow and heat transfer mechanism for micro gaseous flow are useful in broad engineering applications of micro mechanical devices and system.

Heat Transfer Study of Staggered Thin Rectangular Blocks in a Channel Flow

1991 ◽  
Vol 113 (3) ◽  
pp. 294-300 ◽  
Author(s):  
Ching Jen Chen ◽  
Ramiro H. Bravo
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Channel Flow ◽  
Vector Fields ◽  
Block Size ◽  
Navier Stokes ◽  
Maximum Heat ◽  
Flow And Heat Transfer ◽  
Maximum Heat Transfer ◽  
Energy Equations

In this study, fluid flow and heat transfer in two-dimensional staggered thin rectangular blocks in a channel flow heat exchanger is analyzed by the Finite Analytic Numerical Method. The heat exchanger consists of four staggered thin rectangular blocks at temperature T1 placed inside a channel which is formed by two plates maintained at constant temperature T0. The fluid is considered to be incompressible and the flow laminar. Flow and heat transfer from the inlet of the heat exchanger to the outlet are simulated by solving Navier-Stokes and energy equations. Results were obtained for different block spacing and different size of the blocks. Computations were made for Reynolds numbers 100, 500, and 1,000, and Prandtl numbers 0.7 and 4.0. The results are presented in the form of velocity vector fields, isotherms, and local and global Nusselt numbers. The characteristics of the heat transfer and pressure drop in different block size and block separation are analyzed. The optimal length of separation between thin blocks and the optimal block length for maximum heat transfer are determined.

scholarly journals Anomalous intensification of separated flow and heat transfer in one and multiple row deep inclined oval trench dimples on the wall of a narrow channel and on the plate

2021 ◽  
Vol 2088 (1) ◽  
pp. 012018
Author(s):  
S A Isaev ◽  
A I Leontiev ◽  
E E Son ◽  
S V Guvernyuk ◽  
M A Zubin ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Static Pressure ◽  
Separated Flow ◽  
Narrow Channel ◽  
Separation Flow ◽  
State University ◽  
Flow And Heat Transfer ◽  
Numerical Studies ◽  
Moscow State University ◽  
Good Agreement

Abstract At the stands of Research Institute of Mechanics at the Moscow State University, we experimentally confirmed the mechanism of anomalous intensification of the separation flow and heat exchange in inclined oval-trench dimples (OTD) on the plate, which was discovered during numerical studies. The measured static pressure differences in single OTD at Re=6.7×104 are in good agreement with the numerical forecasts within the framework of the RANS approach at Re=104.

Abnormal enhancement of separated turbulent air flow and heat transfer in inclined single-row oval-trench dimples at the narrow channel wall

2019 ◽  
Vol 163 ◽  
pp. 202-207 ◽  
Author(s):  
Sergey Isaev ◽  
Mikhail Gritckevich ◽  
Аlexandr Leontiev ◽  
Igor Popov
Keyword(s):  
Heat Transfer ◽  
Channel Wall ◽  
Air Flow ◽  
Narrow Channel ◽  
Single Row ◽  
Flow And Heat Transfer ◽  
Turbulent Air Flow
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