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- W3164701828 abstract "Thermal contact conductance (TCC) is a key parameter, which influences the reliability of various cryogenic systems. The accurate estimation of TCC is a basic requirement for the optimal design of cryogen-free conduction cooling systems. The lack of reliable TCC results for bare demountable aluminium contacts in the sub-ambient temperature range (50–300 K) prompted us to undertake the systematic experimental investigations. A unique experimental setup has been fabricated to carryout axial heat transfer experiments, which is used for the estimation of TCC between aluminum contacts in the temperature range of 50–300 K. The influence of changing interfacial temperature (50–300 K), interfacial pressure (0.5–12 MPa), and surface roughness parameters (σ = 1.51 to 11.06 μm), as well as the surface finishing process on TCC have been investigated systematically. The finite element (FE) rough surface contact analysis has also been carried out, and real contact area and the TCC has been estimated over the range of interfacial pressure and temperature under considerations. The real contact area was found to be less than 0.1% of the nominal area, even at 12 MPa, and it varies almost linearly with temperature and pressure. The FE estimates of TCC has shown a good agreement with experimental TCC results. Finally, an empirical correlation of TCC has been proposed by incorporating three of the functional parameters, while considering temperature-dependent thermo-mechanical properties into the analysis." @default.
- W3164701828 created "2021-06-07" @default.
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- W3164701828 date "2021-10-01" @default.
- W3164701828 modified "2023-10-18" @default.
- W3164701828 title "Spot conductance measurement of aluminum alloys at cryo-temperatures under varying pressure conditions" @default.
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- W3164701828 doi "https://doi.org/10.1016/j.ijthermalsci.2021.107031" @default.
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