Wicking of Perfectly Wetting Liquids into a Metallic Mesh
نویسندگان
چکیده
Imbibition of liquids into porous media has significant importance to many processes. For example one application is the propellant management device (PMD), or liquid acquisition device (LAD), located within spacecraft tanks [1, 7]. The PMDs are designed to ensure gas free delivery of propellant during all mission accelerations. This is done by using a porous medium, a metallic mesh, which prevents gas from entering due to its bubble point. In this study the wicking of different liquids into a Dutch-Twilled-Weave (DTW) 200×1400 screen is analyzed by combining experimental and numerical approaches. The imbibition experiments were performed under isothermal and terrestrial conditions. Video recordings have been analyzed in order to study the wicking behavior in terms of liquid rise over time. Out of this evaluation mesh pore structure parameters could be determined. The well-known LucasWashburn equation was used, while its limitations under the influence of gravity are pointed out.
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