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Boiling Liquid Does Something in Near-Zero Gravity Even Scientists Didn't See Coming
Currently.com • • science
Key Points:
- A new study published in npj Microgravity reveals that boiling of cryogenic liquids like liquid nitrogen in microgravity can improve heat transfer efficiency up to a certain heat threshold, contrary to previous assumptions.
- Experiments conducted on parabolic flights simulating weightlessness showed that bubbles form sooner and linger on heated surfaces, enhancing heat removal, but this also leads to a sharp drop in the maximum heat the coolant can handle, reducing safety margins by 65%.
- The research highlights the critical role of surface material design, using polished silicon wafers to isolate gravity effects, suggesting that engineering surface features could help delay boiling and improve cooling and fuel storage in space missions.
- These findings have important implications for designing safer and more efficient cooling systems and cryogenic fuel storage for long-duration space exploration, though further studies beyond nitrogen and short flights are needed.
