Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Ergebnis 5 von 268
Microgravity science and technology, 2003-12, Vol.14 (4), p.3-20
2003
Volltextzugriff (PDF)

Details

Autor(en) / Beteiligte
Titel
Influence of lateral acceleration on capillary interfaces between parallel plates
Ist Teil von
  • Microgravity science and technology, 2003-12, Vol.14 (4), p.3-20
Ort / Verlag
Dordrecht: Springer Nature B.V
Erscheinungsjahr
2003
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
  • The paper considers limits for the refill of capillary liquid vanes of propellant management systems for low gravity applications under the influence of residual acceleration. The limit of existence of a connected capillary liquid interfaces in the vanes is analyzed. A mathematical approach to describe the characteristics of a liquid meniscus in the vane is derived under the assumptions of a quasi static interface and negligible viscous and inertia forces. Analytical considerations allow to determine the maximum width of the liquid column within the vane that can be stabilized by capillary forces. If the width of the capillary vanes exceeds this limit, the vane will be only partially filled. The consecutive equation is solved analytically with the approximation that the lateral acceleration does not distort the asymptotic shape of the free surface extended along the edges of the vanes from a circular cylindrical shap. The resulting relations can readily be analyzed and provide very clear insight into the di.erent limits for the meniscus to exist. The results of the approximate solution are compared with numerical solutions considering the actual shape of the distorted free surface. Although the global shape of the existence chart and the lower limits of existence are rather well predicted by the approximate solution, considerable deviations from the numerical solution can be observed for the upper limits with repect to Bond number and maximum width of the vanes. The numerical solution therefore should be preferred. Additionally, the numerical solution does not provide mere existence criteria but real static (geometric) stability criteria. Experimentally, the behaviour of liquid interfaces in vanes was studied under microgravity conditions in a drop tower, using a micro-g centrifuge to impose variable lateral accelerations on the liquid column between the vanes. The results of the experiment are shown to be in very good agreement with the analytical predictions. The analytical approach presented thus yields a powerful means to determine static stability limits of interface configurations subject to lateral forces for arbitrary geometries of the supporting capillary.
Sprache
Englisch
Identifikatoren
ISSN: 0938-0108
eISSN: 1875-0494
DOI: 10.1007/BF02870942
Titel-ID: cdi_proquest_journals_916248126

Weiterführende Literatur

Empfehlungen zum selben Thema automatisch vorgeschlagen von bX