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http://hdl.handle.net/10773/15149
Título: | An inverse problem of Newtonian aerodynamics |
Autor: | Plakhov, Alexander Samko, Stefan |
Palavras-chave: | Inverse problem Rarefied flow Fourier series Spherical convolution operators Fourier-Laplace multipliers Spherical harmonics |
Data: | 2010 |
Resumo: | We consider a rarefied medium in Rd, d ≥ 2 consisting of non-interacting point masses moving at unit velocity in all directions. Given the density of velocity distribution, one easily calculates the pressure created by the medium in any direction. We then consider the inverse problem: given the pressure distribution f : Sd−1 →R+, determine the density ρ : Sd−1 →R+. Assuming that the reflection of medium particles by obstacles is elastic, we show that the solution for the inverse problem is generally non-unique, derive exact inversion formulas, and state necessary and sufficient conditions for existence of a solution. We also present arguments indicating that the inversion is typically unique in the case of non-elastic reflection, and derive exact inversion formulas in a special case of such reflection. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/15149 |
ISSN: | 2041-3165 |
Versão do Editor: | http://nonlinearstudies.com/index.php/mesa/article/view/436 |
Aparece nas coleções: | CIDMA - Artigos OGTCG - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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inverse_problem_13b.pdf | Documento principal | 341.42 kB | Adobe PDF | Ver/Abrir |
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