Hydrodynamic modes of the "beating mercury heart" in varying geometries

verfasst von

S. Smolin, R. Imbihl

Abstract

A mercury drop covered by an aqueous solution which is brought into contact with a metal tip at a fixed potential can be excited to sustained electromechanical oscillations ("beating mercury heart"). The driving force for these pulsations is the electrocapillary effect. We investigated these excitations for the traditional watch glass geometry and for linear and ring-shaped geometries with different lengths and diameters, respectively, varying the potential of the metal tip. We find standing waves in the linear geometry with the number of nodes depending on the potential. In the ring geometry we observe a fast pulsation mode and a slow mode with 2-fold symmetry axis. In addition, we find solitary waves circulating on the ring.

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie

Typ

Artikel

Journal

Journal of Physical Chemistry

Band

100

Seiten

19055-19058

Anzahl der Seiten

4

ISSN

0022-3654

Publikationsdatum

05.12.1996

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeiner Maschinenbau, Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1021/jp9616425 (Zugang: Geschlossen)