Diffusion of water into purged volumes

Lubos Brieda; John Newcome; Therese Errigo

doi:10.1117/12.2061939

18 September 2014 Diffusion of water into purged volumes

Lubos Brieda, John Newcome, Therese Errigo

Proceedings Volume 9196, Systems Contamination: Prediction, Measurement, and Control 2014; 919606 (2014) https://doi.org/10.1117/12.2061939
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

In this paper, we report on an experimental and numerical effort to characterize removal and infiltration of atmospheric water vapor into a cavity purged with dry GN2. Multiple miniature sensors were used to track humidity and pressure inside a cylindrical enclosure with internal obstruction and a secondary volume. These measurements were compared against the well-known model of Scialdone. Although our data indicate a similar exponential-like decay, the t parameters differed from the predicted values. In addition, a numerical model was developed to study the purge and infiltration problem in more detail. The model utilizes an Advection-Diffusion solver for the contaminant species, and an incompressible Navier-Stokes solver for the flow velocity. Comparison of preliminary numerical results with the experimental data is presented.

Citation Download Citation

Lubos Brieda, John Newcome, and Therese Errigo "Diffusion of water into purged volumes", Proc. SPIE 9196, Systems Contamination: Prediction, Measurement, and Control 2014, 919606 (18 September 2014); https://doi.org/10.1117/12.2061939

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