Journal Article

PreJuSER-2769

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Theory of the leak-rate of seals

Persson, B. N. J.FZJ* ; Yang, C.FZJ*

2008
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/0953-8984/20/31/315011

Abstract: Seals are extremely useful devices to prevent fluid leakage. However, the exact mechanism of roughness induced leakage is not well understood. We present a theory of the leak-rate of seals, which is based on percolation theory and a recently developed contact mechanics theory. We study both static and dynamic seals. We present molecular dynamics results which show that when two elastic solids with randomly rough surfaces are squeezed together, as a function of increasing magnification or decreasing squeezing pressure, a non-contact channel will percolate when the (relative) projected contact area, A/A(0), is of the order 0.4, in accordance with percolation theory. We suggest a simple experiment which can be used to test the theory.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2008

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