Which effect does an increase in temperature have on thermal contact conductance between two surfaces?

💡 Explanation

When temperature increases, enhanced plastic deformation occurs at the contacting asperities of two surfaces because material strength decreases improving the conformity and increasing real contact area. Therefore conductance increases, rather than decreases or remaining constant which typically require lower temperatures or increased surface roughness.

• Which mechanism causes deviations from ideal predictions when the Navier-Stokes equation is applied to turbulent flow around an airfoil?
• Which phenomenon causes increased drag when the Reynolds number exceeds a critical value for airflow around an aircraft wing?
• Which consequence results when catalytic hydrogenation's hydrogen supply is exhausted?
• Which consequence results when applying an inaccurate basis set during ab initio molecular dynamics simulations?
• Which outcome occurs when the temperature-control feedback response increasingly oscillates around the setpoint in a chemical reactor?
• Which outcome occurs when enriched uranium-235 reaches criticality?