Thermal Contact Resistance Modeling of Non-Flat, Roughened Surface With Non-Metallic Coatings  

Oleh:

Dietz, Thomas A. ; Marotta, E. E. ; Fletcher, L. S.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 123 no. 1 (Feb. 2001), page 11-23.
Topik: thermal field; thermal contact; resistance modeling; non - flat; roughened surface; non - metallic coatings

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Essentially all models for prediction of thermal contact conductance or thermal contact resistance have assumed optically flat surfaces for simplification. A few thermal constriction models have been developed which incorporate uncoated, optically non -flat surfaces based on the bulk mecha nical properties of the material. Investigations have also been conducted which incorporate the thermophysical properties of metallic coatings and their effective surface microhardness to predict the overall thermal contact conductance. However, these studies and subsequent models have also assumed optically flat surfaces; thus, the application of these models to optically non - flat, coated surface conditions is not feasible without modifications. The present investigation develops a thermomechanical model that combines both microscopic and macroscopic thermal resistances for non -flat, roughened, surfaces with non - metallic coatings. The thermomechanical model developed as a result of this study predicts the thermal contact resistance of several non - metallic coatings deposited on metallic aluminum substrates quite well.

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