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Numerical analysis is performed to make a comparative study of laminar forced convective heat transfer in the simultaneously developing regions of heated square ducts. A non-conjugate case, a square duct with single-solid and a square duct with two-solids are selected for the present study. The square duct with two-solids is formed by cladding steel duct over the single-solid Aluminium square duct...
The three dimension micro-scale flow field in spiral groove dry gas seals(S-DGS) is simulated by using CFD software based on gas lubrication theory in this article. Effect of gas flow state on the Seal performance is analyzed under different gas film thickness. Laminar model and k-ε turbulent model are used separately to obtain the open force, leakage rate. The results show that gas pressure distribution...
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