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- W2801140432 abstract "It is widely accepted that mirror seeing is caused by turbulent fluctuations in the index of air refraction in the vicinity of a telescope mirror. Computational Fluid Dynamics (CFD) is a useful tool to evaluate the effects of mirror seeing. In this paper, we present a numerical method to estimate the mirror seeing for a large optical telescope (∼ 4 m) in cases of natural convection with the ANSYS ICEPAK software. We get the FWHM of the image for different inclination angles (i) of the mirror and different temperature differences (ΔT) between the mirror and ambient air. Our results show that the mirror seeing depends very weakly on i, which agrees with observational data from the Canada-France-Hawaii Telescope. The numerical model can be used to estimate mirror seeing in the case of natural convection although with some limitations. We can determine ΔT for thermal control of the primary mirror according to the simulation, empirical data and site seeing." @default.
- W2801140432 created "2018-05-17" @default.
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- W2801140432 date "2018-05-01" @default.
- W2801140432 modified "2023-10-15" @default.
- W2801140432 title "Estimating the mirror seeing for a large optical telescope with a numerical method" @default.
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- W2801140432 doi "https://doi.org/10.1088/1674-4527/18/5/60" @default.
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