Scaling two-phase flows to Mars and Moon gravity conditions

Hurlbert, Kathryn Miller; Witte, L. C.; Best, Frederick R.; Kurwitz, Cable

doi:10.1016/j.ijmultiphaseflow.2004.01.004

Cited by 15 publications

(2 citation statements)

References 6 publications

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“…However, the software did begin to over-predict the pressure drop in certain regions of a flow regime map, indicating that some models used in the software package for reduced-gravity modeling needed improvement. Hurlbert et al (2004) presented hydrodynamic measurements for two-phase flows in Mars and Moon gravity conditions. High-accuracy pressure-drop and flow rate data were obtained using dichlorodifluoromethane (i.e., R-12) as the working fluid flowing in a nominally 11.1 mm inner diameter tube.…”

Section: Literature Reviewmentioning

confidence: 99%

Review and Modeling of Two-Phase Frictional Pressure Gradient at Microgravity Conditions

Awad

Muzychka

2010

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C

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First, a detailed review of two-phase frictional pressure gradient at microgravity conditions is presented. Then, a simple semi-theoretical method for calculating two-phase frictional pressure gradient at microgravity conditions using asymptotic analysis is presented. Two-phase frictional pressure gradient is expressed in terms of the asymptotic single-phase frictional pressure gradients for liquid and gas flowing alone. In the present model, the two-phase frictional pressure gradient for x ≅ 0 is nearly identical to single-phase liquid frictional pressure gradient. Also, the two-phase frictional pressure gradient for x ≅ 1 is nearly identical to single-phase gas frictional pressure gradient. The proposed model can be transformed into either a two-phase frictional multiplier for liquid flowing alone (φl2) or two-phase frictional multiplier for gas flowing alone (φg2) as a function of the Lockhart-Martinelli parameter, X. Comparison of the asymptotic model with experimental data at microgravity conditions is presented.

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Section: Literature Reviewmentioning

confidence: 99%

Review and Modeling of Two-Phase Frictional Pressure Gradient at Microgravity Conditions

Awad

Muzychka

2010

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C

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“…These issues have manifested as the destruction of microfluidic biological samples, decreased heat transfer in heat exchangers, reduced flow rates in heat pipes, and the formation of bubbles in intravenous medical systems (Chiaramonte and Joshi, 2004;Dhir et al, 2007;Herman, 2013;Burke, 2021). To this day, problems encountered by the ISS ECLSS systems are unable to be replicated in terrestrial laboratories, operating under 1 g conditions (Hurlbert et al, 2004;Burke, 2021).…”

Section: Introduction and Importance Of Workmentioning

confidence: 99%

Modeling electrolysis in reduced gravity: producing oxygen from in-situ resources at the moon and beyond

Burke,

Nord,

Hibbitts

et al. 2024

Front. Space Technol.

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Molten Regolith Electrolysis, as an in situ resource utilization (ISRU) technology, has the potential to enable the production of oxygen and metallic alloys on the Lunar surface; opening new doors in Cis-Lunar, and eventually Martian space exploration. This research studies the fundamental physics which govern the formation, growth, detachment, and rise of electrolytic bubbles. To this end, computational fluid dynamic (CFD) models were developed and run, to simulate water electrolysis, molten salt electrolysis (MSE), and molten Lunar regolith (MRE) electrolysis across multiple reduced gravity levels. The results demonstrate that reduced gravity, electrode surface roughness (possibly due to surface degradation), fluid properties, and electrode orientation can all affect electrolytic efficiency and possibly even stall electrolysis by delaying bubble detachment. The findings of this research must be considered when designing and operating electrolysis systems at reduced gravity levels.

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Hydrodynamics of Intermediate-Scale Taylor Flow under Gravities of Space Colonies

Darzi

Park

2019

Microgravity Sci. Technol.

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Scaling two-phase flows to Mars and Moon gravity conditions

Cited by 15 publications

References 6 publications

Review and Modeling of Two-Phase Frictional Pressure Gradient at Microgravity Conditions

Review and Modeling of Two-Phase Frictional Pressure Gradient at Microgravity Conditions

Modeling electrolysis in reduced gravity: producing oxygen from in-situ resources at the moon and beyond

Hydrodynamics of Intermediate-Scale Taylor Flow under Gravities of Space Colonies

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