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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

A MATHEMATICAL MODEL OF LIGHT PRESSURE UPON A THIN FILM SPACE STRUCTURE WITH WRINKLES

Get access (open in a dialog) DOI: 10.1615/IHTC16.rti.021534
pages 8225-8231

Resumo

In this work, we study the effects of nonideality of the shape and optical properties of the surface of a thin film space structure on the resultant force and torque of light pressure on it, as well as on its thermal state. Examples of such kinds of structures are solar sails, large-scale thin film reflectors, and thin film heat shields. We consider that self-shadowing and re-reflections can occur within the structure. The appearance of wrinkles on the film can lead to the spatial anisotropy of light reflection. We take into account the self-shadowing and secondary reflections semi-analytically by utilizing the modified Generalized Sail Model with refinement in the form of the expansion of the visibility function concerning the Chebyshev polynomials of the first kind. For the wrinkled domain of the thin film, we utilize the proposed model of the optically orthotropic surface.