Surface Roughness Effects in Reflection and Emission of Infrared Radiation for Aerospace Materials in Extreme Environments
Abstract
The principal motivation of this proposal is to provide a better understanding of the interactionof infrared radiation with aerospace materials in extreme environments. In this context, thesurface roughness of the materials surface has an important impact on the reflection andabsorption of incident radiation from material surfaces. Here, we will develop a computationalmodel for surface roughness effects to understand the interaction of infrared radiation withrough surfaces of materials, including polar dielectric and refractory metals. A detailedtheoretical formulation and a numerical implementation is achieved based on the smallperturbation method/small slope approximation (SPM/SSA). The code will be capable ofvarious statistical descriptions for rough surfaces, including Gaussian power spectral density.Using the developed computational code, we will investigate the effects of various roughsurface parameters, such as correlation length and surface roughness height, on the reflectionand absorption spectrum of different materials, including polar dielectric and refractory metals.In addition, we will investigate interesting research problems related to spectral broadening ofvarious materials as outlined in the research methodology section of this proposal.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 30, 2018
- Source ID
- FA95501810240
Entities
People
- Kursat Sendur
Organizations
- Air Force Office of Scientific Research
- Sabancı University
- United States Air Force