We study light absorption by weakly rough metal surfaces with the roughness amplitude and correlation length smaller than skin depth in metal. develop a systematic perturbative approach for calculation of absorptance such systems find that roughness-related variations are determined an interplay between several system parameters which can result, particular, greater amplitudes. show that, small...

1.Introduction The wave scattering from rough surfaces is an important problem which closely relates to the measurement technology or diagnosing techniques by using microwave, millimeter wave, light wave or acoustic wave (1). Various kinds of theoretical models and methods for analyzing the wave scattering from random rough surfaces have been proposed so far. However, they have often used appro...

Most diffraction theories for random rough surfaces are based on the assumption of a Gaussian height distribution. In this paper, a diffraction theory for non-Gaussian rough surfaces is developed and the relationship between the roughness parameters and the diffraction characteristics is explored. It is shown that a non-Gaussian rough surface can dramatically alter the diffraction for (k'w) @1,...

Wind tunnel measurements over commercially available foams have been performed to characterize the boundary-layer flow realistic permeable rough surfaces. The mean indicates that these surfaces can be considered similar rough-walls in log region. near-wall region appears under combined influence of roughness and permeability. An analysis framework based on data is presented where future studies...

The random process theory (RPT) has been widely applied to predict the joint probability distribution functions (PDFs) of asperity heights and curvatures of rough surfaces. A check of the predictions of RPT against the actual statistics of numerically generated random fractal surfaces and of real rough surfaces has been only partially undertaken. The present experimental and numerical study pro...

In this paper, we present a novel modeling method for synthesizing rough surfaces using discrete surface growth models. We employ a two-pass method. Initial point cluster data is generated using discrete simulation models derived from physical surface growth and evolution. Then, a final surface is reconstructed from the point clusters by a level set method. Since many rough surfaces in nature a...

Starting with Zenneck and Sommerfeld wave propagation over a flat finitely conducting surface has been extensively studied by Wait and many other authors. In this paper, we examine propagation over a finitely conducting rough surface, also studied by many people including Feinberg, Bass, Fuks, and Barrick. This paper extends the multiple scattering theories based on Dyson and Bethe–Salpeter equ...

All surfaces and interfaces between dissimilar materials are rough. The extent to which this roughness affects the reflection of elastic waves has been the subject of study for many decades. A recent book by Ogilvy [1] provides a comprehensive review and summary of this subject. The problem is of particular interest in ultrasonic nondestructive evaluation. For example, it has been shown that fo...