Experiment and simulation of the recirculation flow in a CVD reactor for monolithic materials

Gong, S.C.; Liu, R.G.; Chou, Fu–Chu; Chiang, Anthony S.T.

doi:10.1016/0894-1777(95)00067-4

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…Eichler et al (1998) and Gómez-Moreno et al (2002) reported that turbulent transition in an orifice flow occurred at Reynolds number around 70. Back and Roschke (1972) and Gong et al (1996) found flow instabilities around a Reynolds number of 200 downstream of sudden expansions. Our design tool constrains Reynolds numbers (Re) to be below 200.…”

Section: Assumptionsmentioning

confidence: 99%

A Design Tool for Aerodynamic Lens Systems

Wang

McMurry

2006

Aerosol Science and Technology

105

125

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We report in this article the development of a tool to design and evaluate aerodynamic lens systems: the Aerodynamic Lens Calculator. This Calculator enables quick and convenient design of aerodynamic lens systems based on the parameterized knowledge gained from our detailed numerical simulations of flow and particle transport through aerodynamic lens systems. It designs the key dimensions of a lens system: pressure limiting orifice, relaxation chamber, focusing lenses, spacers and the accelerating nozzle. It also provides estimates of particle terminal axial velocities, particle beam width, and particle transmission efficiencies. This article describes in detail the information that is used in the design tool, including equations for pressure drop through orifices, contraction factors as a function of Reynolds, Mach and Stokes numbers, spacer length as a function of Reynolds number and estimations for the relaxation chamber dimensions. The article also evaluates the performance of the design tool by comparing its predictions with the performance of aerodynamic lens systems that have been described in the literature.

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