Spectral directional emittance of rough metal surfaces  Comparison of random and pyramidal surface models
Abstract
The theoretical predictions of the spectral directional emittance of roughened metal surfaces for two surface roughness models are presented. The surface roughness is described by either a Gaussian distribution of surface heights and slopes or by pyramidal shaped surface asperities to approximate the surface roughness. The slope and height of the pyramidal model are equal to the rms values of metal surfaces with random distribution of surface asperities. The effect of blockage of surface peaks by adjacent peaks in the direction of observation is taken into account.
 Publication:

2nd Thermophysics and Heat Transfer Conference
 Pub Date:
 May 1978
 Bibcode:
 1978tpht.confQ....A
 Keywords:

 Emittance;
 Metal Surfaces;
 Pyramidal Bodies;
 Spectral Emission;
 Surface Roughness Effects;
 Directivity;
 Normal Density Functions;
 Random Processes;
 Physics (General)