Motion of Liquid Convective Flow and Heat Transfer Analysis of Flame Spread over butanol fuel within narrow channels

Flow and heat transfer analysis in ventilated cavities is one of the most widely studied problems in thermo-fluids area. Two-dimensional mixed convection in a ventilated rectangular cavity with baffles is studied numerically and the fluid considered in this study is hot air (Pr = 0.71). The horizontal walls are maintained at a constant temperature, higher than that imposed on the vertical ones. Two very thin heat-conducting baffles are inserted inside the enclosure, on its horizontal walls, to control the flow of convective fluid. The governing equations are discretized using the finite volume method and the SIMPLER algorithm to treat the coupling velocity–pressure. Line by line method is used to solve iteratively the algebraic equations. The effect of the Richardson number Ri (0.01- 100) and the location of the baffles within the cavity on the isothermal lines, streamlines distributions and the average Nusselt number (Nu) has been investigated. The result shows that the location opposite the baffles, close to the fluid outlet, is the optimal choice to be considered for industrial applications.

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A Conjugate 3-D Flow and Heat Transfer Analysis of a Thermal Barrier Cooled Turbine Guide Vane

Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration ◽

10.1115/98-gt-089 ◽

1998 ◽

Author(s):

Dieter E. Bohn ◽

Volker J. Becker

Keyword(s):

Heat Transfer ◽

Gas Turbines ◽

Guide Vane ◽

Suction Side ◽

Heat Transfer Analysis ◽

Thermal Barrier ◽

Trailing Edge ◽

Flow And Heat Transfer ◽

Turbine Guide Vane ◽

Basic Configuration

This paper presents the numerical investigations of the flow and heat transfer of two configurations of a transonic turbine guide vane. The basic configuration is a vane with convection cooling. The second configuration is additionally coated with a thermal barrier consisting of ZrO2. The results are obtained with a conjugate heat transfer and flow computer code that has been developed at the Institute of Steam and Gas Turbines. Measurement data is available for the basic configuration and the computational results are compared to the experimental results. The results show very good agreement between calculated and measured vane surface temperatures. The trailing edge turns out to be subjected to high thermal loads as it is too thin to be cooled effectively. Secondary flow phenomena like the passage vortex and the corner vortex and their impact on the temperature distribution are discussed. The ZrO2 coating is calculated for a thickness of 300μm. The substrate material temperatures are lowered by about 20 K–29 K in the stagnation point area and by about 27 K–43 K in the shock area on the suction side. At the trailing edge, the coating on the suction side and on the pressure side hardly influences the metal temperature.

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Flow and heat transfer analysis of magnetohydrodynamic (MHD) second-grade fluid in a channel with a porous wall

Journal of the Brazilian Society of Mechanical Sciences and Engineering ◽

10.1007/s40430-017-0715-y ◽

2017 ◽

Vol 39 (6) ◽

pp. 2145-2157 ◽

Cited By ~ 6

Author(s):

K. P. Priyadarsan ◽

S. Panda

Keyword(s):

Heat Transfer ◽

Porous Wall ◽

Heat Transfer Analysis ◽

Second Grade ◽

Second Grade Fluid ◽

Flow And Heat Transfer ◽

Grade Fluid

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Gas Flow and Heat Transfer Analysis for an Anode Duct in Reduced Temperature SOFCs

1st International Fuel Cell Science, Engineering and Technology Conference ◽

10.1115/fuelcell2003-1721 ◽

2003 ◽

Cited By ~ 1

Author(s):

Jinliang Yuan ◽

Masoud Rokni ◽

Bengt Sunde´n

Keyword(s):

Heat Transfer ◽

Fuel Cell ◽

Porous Layer ◽

Gas Flow ◽

Porous Electrode ◽

Three Dimensional ◽

Gas Permeation ◽

Heat Transfer Analysis ◽

Fuel Cell Performance ◽

Flow And Heat Transfer

In this study, a fully three-dimensional calculation method has been further developed to simulate and analyze various processes in a thick anode duct. The composite duct consists of a porous layer, the flow duct and solid current connector. The analysis takes the electrochemical reactions into account. Momentum and heat transport together with gas species equations have been solved by coupled source terms and variable thermo-physical properties (such as density, viscosity, specific heat, etc.) of the fuel gases mixture. The unique fuel cell conditions such as the combined thermal boundary conditions on solid walls, mass transfer (generation and consumption) associated with the electrochemical reaction and gas permeation to / from the porous electrode are applied in the analysis. Results from this study are presented for various governing parameters in order to identify the important factors on the fuel cell performance. It is found that gas species convection has a significant contribution to the gas species transport from / to the active reaction site; consequently characteristics of both gas flow and heat transfer vary widely due to big permeation to the porous layer in the entrance region and species mass concentration related diffusion after a certain distance downstream the inlet.

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