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Diffusion of aluminium, chromium, iron, nickel and carbon in a steel weld joints in the temperature interval 500 to 1100°C
Stránský, K. ; Million, Bořivoj ; Michalička, Petr ; Foret, R. ; Rek, A.
Measurements of Al, Cr, Fe, Ni and C diffusion in steel welded joints of the modified 12050 steels and high alloy austenitic chromium-nickel steel 17242. Three types of aluminium modified steels were used: 0.34, 0.49 and 1.15 wt.%Al. The isothermal annealing 500-1100°C (with the steps 50°C) and 1050-1.5 hours of weld joints was applied. The diffusion coefficients Al, Cr, Fe, Ni and C were established and the relations among diffusion coefficients were discussed.
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Numerické řešení proudění zakřiveným difuzorem
Louda, Petr ; Kozel, K. ; Příhoda, Jaromír
Numerical solution of turbulent flow through a curved diffuser is based on the artificial compressibility method. A cell centered finite volume method is used for spatial discretization. The time discretization uses the backward Euler implicit scheme with turbulence model equations solved decoupled from RANS equations. Results obtained by two different turbulence models - two-equation SST model and EARSM model - are compared and discussed.
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