Investigation and modelling of edge corrosion of e‐coated galvanized steel with respect to the spatial edge orientation

Abstract In this paper we wish to present the numerical model elaborated in order to simulate some physical phenomena that influence the general deterioration of steel, whether hot dip galvanized or not, in reinforced concrete. We describe the physical and mathematical models, establishing the corresponding equation system, the initial and boundary conditions. We have also presented the numeric model associated to the mathematical model and the numeric methods of discretization and solution of the differential equations system that describes the mathematical model.

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Laser pressure welding of galvanized steel and pure aluminum

10.2351/1.5061424 ◽

2008 ◽

Author(s):

Koji Nishimoto ◽

Yoshihiro Okumoto ◽

Tomoki Harano ◽

Ken Atagi ◽

Hiroo Fujii ◽

...

Keyword(s):

Pure Aluminum ◽

Galvanized Steel ◽

Pressure Welding

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On the role of edge orientation in stereo vision

Electronic Imaging ◽

10.2352/issn.2470-1173.2019.12.hvei-209 ◽

2019 ◽

Vol 2019 (12) ◽

pp. 209-1-209-6

Author(s):

Alfredo Restrepo ◽

Julian Quiroga

Keyword(s):

Stereo Vision ◽

Edge Orientation

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Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs

Engineering and Technology Journal ◽

10.30684/etj.v38i3a.462 ◽

2020 ◽

Vol 38 (3A) ◽

pp. 402-411

Author(s):

Mohannad R. Ghanim ◽

Sabah T. Ahmed

Keyword(s):

Inclination Angle ◽

Convection Heat Transfer ◽

Ventilation Rate ◽

Channel Length ◽

Air Gap ◽

Galvanized Steel ◽

Heat Gain ◽

Solar Heat ◽

Double Skin ◽

Solar Heat Gain

Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model. The model was made of two parallel galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq. The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities. It is found that using a double skin roof arrangement with a sufficient air gap (S) can reduce the heat gain significantly. The higher the inclination angle (ϴ) the higher the ventilation rate, the lower the heat gain through the roof. In this study, increasing the air gap from 2 cm to 4 cm reduced the heat gain significantly but when the gap was further increased to 6 cm, the reduction in the heat flux was insignificant. A dimensionless correlation was also reduced between Nusselt number () and the single parameter where L is the channel length. This correlation can be handily utilized for designing of engineering applications dealing with high temperature difference natural convection heat transfer.

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