Astatistical model to predict thermal gap conductance between conforming rough surfaces
Abstract
New gap conductance models are developed to account for gas properties and pressure, and surface roughness and its deformation under load. Both slip and rarefied gas conditions are incorporated in the thermal model. Dimensionless gap conductance correlations are presented in integral and graphical form. The conductance is dependent upon a modified Knudsen number, relative gap separation and a conductivity ratio. The proposed correlations are in good agreement with limited experimental data.
- Publication:
-
American Institute of Aeronautics and Astronautics Conference
- Pub Date:
- June 1982
- Bibcode:
- 1982aiaa.confR....Y
- Keywords:
-
- Gas Pressure;
- Gas Temperature;
- Heat Transfer;
- Solid-Solid Interfaces;
- Statistical Analysis;
- Surface Roughness;
- Thermal Conductivity;
- Flow Resistance;
- Knudsen Flow;
- Rarefied Gas Dynamics;
- Temperature Profiles;
- Transition Flow;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer