Design and performance of an experiment for the investigation of open capillary channel flows

Rosendahl, Uwe; Dreyer, Michael

doi:10.1007/s00348-007-0274-6

Cited by 13 publications

(8 citation statements)

References 6 publications

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“…The forced liquid flow through open capillary channels was investigated experimentally, theoretically and numerically by Rosendahl et al (2004), Haake et al (2006), Rosendahl and Dreyer (2007), Grah et al (2008). It was found that for an internal liquid pressure lower than ambient gas pressure, the free liquid surface is bent inwards and concave at any cross section.…”

Section: State Of Artmentioning

confidence: 99%

“…This procedure is crucial to avoid leakage of the liquid during the launch. Temperature-induced volume changes in the main reservoir are compensated by the flexible membrane in the supply tank (4) (see Rosendahl and Dreyer 2007).…”

Section: General Procedures Of the Experiments Performancementioning

confidence: 99%

“…1b represent the nozzle and the screen, respectively. Details of the setup and the operation are given by Rosendahl and Dreyer (2007). The fluid temperature is measured at several locations (T 1 , T 2 and T 3 ) via temperature sensors (Fig.…”

Section: Fluid Loop and Test Cellmentioning

confidence: 99%

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Experimental Investigation of a Bubbly Two-Phase Flow in an Open Capillary Channel under Microgravity Conditions

Salim

Colin

Dreyer

2009

Microgravity Sci. Technol.

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The study of a bubbly laminar two-phase flow in an open capillary channel under microgravity conditions was conducted aboard the sounding rocket, Texus-45. The channel geometry, the liquid (FC-72) and the experimental conditions were chosen based on an analysis for application toward liquid management in space. The channel consists of two parallel plates that were b = 25 mm wide and separated by a distance of a = 10 mm. The flow along the length l = 80 mm is bounded by a free surface on one side and a plate on the opposite side. Bubbles are injected at the inlet of the capillary channel via six capillary tubes. The features of the gas injection were chosen with regard to the required bubble size, the injection frequency, and the gas and liquid flow rates. Different liquid and gas flow rates were tested leading to a volumetric quality ranging between 0.07 and 0.11. The experimental results show the interaction among bubbles and with the liquid free surface.A. Salim (B) · M.

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Section: State Of Artmentioning

confidence: 99%

Section: General Procedures Of the Experiments Performancementioning

confidence: 99%

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Experimental Investigation of a Bubbly Two-Phase Flow in an Open Capillary Channel under Microgravity Conditions

Salim

Colin

Dreyer

2009

Microgravity Sci. Technol.

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show abstract

“…The hydrodynamics and the stability of forced flows in open capillary channels were investigated by Rosendahl et al (2001Rosendahl et al ( , 2004, Haake et al (2006), Rosendahl and Dreyer (2007), Grah et al (2008). For an internal liquid pressure lower than ambient gas pressure the free liquid surface is bent inwards and concave at any cross section.…”

Section: Introductionmentioning

confidence: 99%

“…As the liquid free surface shape is very sensitive to pressure variations, the open capillary channel is an interesting geometry to investigate some characteristics of laminar bubbly flows in microgravity (wall shear stress, bubble velocity and bubble size evolution). Since hardware design and manufacturing are very expensive, the existing hardware developed for the study of open capillary channel by Rosendahl and Dreyer (2007) has been reused and modified to allow the study of a laminar bubbly flow in microgravity, that has never been studied before: a new design of the channel geometry was proposed and a air supply circuit and small capillary tubes were added to inject bubbles in the capillary channel.…”

Section: Introductionmentioning

confidence: 99%