TY  - JOUR
AU  - Huon, C.
AU  - Tiwari, A.
AU  - Rotella, C.
AU  - Mangiagalli, P.
AU  - Persson, Bo
TI  - Air, Helium and Water Leakage in Rubber O-ring Seals with Application to Syringes
JO  - Tribology letters
VL  - 70
IS  - 2
SN  - 1023-8883
CY  - Dordrecht
PB  - Springer Science  Business Media B.V.
M1  - FZJ-2022-03882
SP  - 35
PY  - 2022
AB  - We study the leakage of fluids (liquids or gases) in syringes with glass barrel, steel plunger and rubber O-ring stopper. Theleakrate depends on the interfacial surface roughness and on the viscoelastic properties of the rubber. Random surface rough-ness is produced by sandblasting the rubber O-rings. We present a very simple theory for gas flow which takes into accountboth the diffusive and ballistic flow. The theory shows that the interfacial fluid flow (leakage) channels are so narrow thatthe gas flow is mainly ballistic (the so called Knudsen limit). We compare the leakrate obtained using air and helium. Forbarrels filled with water we observe no leakage even if leakage occurs for gases. We interpret this as resulting from capillary(Laplace pressure or surface energy) effects.Keywords Syringes · Seals · Helium leakage · Ballistic gas flow · Interfacial separation · Viscoelasticity
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000760271100001
DO  - DOI:10.1007/s11249-022-01574-7
UR  - https://juser.fz-juelich.de/record/910499
ER  -