Sounding rocket experiment on capillary channel flow

Details Sounding rocket experiment on capillary channel flow Sounding rocket experiment on capillary channel flow

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.590..551r&link_type=abstract

In: 17th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 30 May - 2 June 2005, Sandefjord, Norway.

Computer Science

Sound

Microgravity, Capillary Channel Flow, Free Surfaces, Open Channels, Flow Limitation

Scientific paper

This paper is concerned with flow rate limitations in open capillary channels under low-gravity conditions. The channels consist of two parallel plates bounded by free liquid surfaces along the open sides. In the case of steady flow the capillary pressure of the free surface balances the differential pressure between the liquid and the surrounding constant-pressure gas phase. A maximum flow rate is achieved when the adjusted volumetric flow rate exceeds a certain limit leading to a collapse of the free surfaces. In order to investigate this type of flow an experiment aboard the sounding rocket TEXUS-41 was performed. The aim of the investigation was to achieve the profiles of the free liquid surfaces and to determine the maximum flow rate of the steady flow. For this purpose a new approach to the critical flow condition by enlarging the channel length was applied. The paper gives a review of the experimental set-up and the preparation of the flight procedures. Furthermore the experiment performance is described and the typical appearance of the flow indicated by its surface profiles is presented.

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