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Updated: Feb 12, 2026

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Development of a passive phase separator for space and earth applications
Xiongjun Wu1, Greg Loraine1, Chao-Tsung Hsiao1
1Dynaflow, Inc., 10621 J Iron Bridge Road, Jessup, MD 20794, USA.
Summary
Recycling fluids in space is crucial for long missions. This study presents a passive phase separator that efficiently separates gas-liquid mixtures, essential for life support systems in space and on Earth.
Area of Science:
- Aerospace Engineering
- Fluid Dynamics
- Chemical Engineering
Background:
- Extended human space exploration necessitates efficient recycling of vital resources like liquids and gases.
- Gas-liquid mixtures are common in fluid recycling systems, posing separation challenges, especially in microgravity where buoyancy is absent.
Purpose of the Study:
- To develop a passive phase separator for reliable and efficient separation of gas-liquid mixtures.
- To address the challenges of separating intermixed fluids in microgravity environments.
Main Methods:
- Development of a novel passive phase separator design.
- Testing the separator's performance across a range of flow rates and void fractions.
- Validation of the separator's applicability in both space and terrestrial environments.
Main Results:
- The passive phase separator demonstrates efficient and reliable performance.
- Successful separation of gas-liquid mixtures with both high and low void fractions.
- The device operates effectively across a wide range of flow rates.
Conclusions:
- The developed passive phase separator is a viable solution for fluid management in space missions.
- The technology has potential applications in terrestrial fluid processing and recycling systems.
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