Revisiting the NASA surface tension driven convection experiments

Sequeira, Yohan; Maitra, Abhradeep; Pandey, Anupam; Jung, Sunghwan

doi:10.1038/s41526-022-00189-5

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…In space, microgravity reduces the effects of hydrodynamic shear and hydrostatic pressure, making surface tension the dominant force. [ 64 ] This results in molecules staying in tight spheres and films, maximizing intermolecular attraction. Additionally, the absence of gravity causes droplets to form almost perfect spheres, and the movement of fluid spheres and films is slower in space compared to movement on Earth.…”

Section: Current Challenges In 3d Bioprinting In Spacementioning

confidence: 99%

Bioprinting of Cardiac Tissue in Space: Where Are We?

Tabury

Rehnberg

Baselet

et al. 2023

Adv Healthcare Materials

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Bioprinting in space is the next frontier in tissue engineering. In the absence of gravity, novel opportunities arise, as well as new challenges. The cardiovascular system needs particular attention in tissue engineering, not only to develop safe countermeasures for astronauts in future deep and long‐term space missions, but also to bring solutions to organ transplantation shortage. In this perspective, the challenges encountered when using bioprinting techniques in space and current gaps that need to be overcome are discussed. The recent developments that have been made in the bioprinting of heart tissues in space and an outlook on potential future bioprinting opportunities in space are described.

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Section: Current Challenges In 3d Bioprinting In Spacementioning

confidence: 99%

Bioprinting of Cardiac Tissue in Space: Where Are We?

Tabury

Rehnberg

Baselet

et al. 2023

Adv Healthcare Materials

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“…The difference in gravitational pull on the Earth’s surface and in space has a dramatic effect on surface tension and fluid dynamics. 102 Surface tension is the attraction of molecules within a fluid toward each other, and this attraction competes with gravity on the Earth’s surface. 103 Surface tension serves as a cohesive force drawing fluid together, while gravity compels it to dip in the center, eventually pulling the molecules apart.…”

Section: Microgravitymentioning

confidence: 99%

Changes in interstitial fluid flow, mass transport and the bone cell response in microgravity and normogravity

et al. 2022

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In recent years, our scientific interest in spaceflight has grown exponentially and resulted in a thriving area of research, with hundreds of astronauts spending months of their time in space. A recent shift toward pursuing territories farther afield, aiming at near-Earth asteroids, the Moon, and Mars combined with the anticipated availability of commercial flights to space in the near future, warrants continued understanding of the human physiological processes and response mechanisms when in this extreme environment. Acute skeletal loss, more severe than any bone loss seen on Earth, has significant implications for deep space exploration, and it remains elusive as to why there is such a magnitude of difference between bone loss on Earth and loss in microgravity. The removal of gravity eliminates a critical primary mechano-stimulus, and when combined with exposure to both galactic and solar cosmic radiation, healthy human tissue function can be negatively affected. An additional effect found in microgravity, and one with limited insight, involves changes in dynamic fluid flow. Fluids provide the most fundamental way to transport chemical and biochemical elements within our bodies and apply an essential mechano-stimulus to cells. Furthermore, the cell cytoplasm is not a simple liquid, and fluid transport phenomena together with viscoelastic deformation of the cytoskeleton play key roles in cell function. In microgravity, flow behavior changes drastically, and the impact on cells within the porous system of bone and the influence of an expanding level of adiposity are not well understood. This review explores the role of interstitial fluid motion and solute transport in porous bone under two different conditions: normogravity and microgravity.

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“…The Marangoni flow around the surface bubble and its influence on the boiling heat transfer in the space microgravity environment were investigated in Refs. 31 , 32 The authors found that the Marangoni effect was more significant and the flow pattern was different in the space microgravity environment, which changed the temperature profile around the bubble and resulted in a higher bubble growth rate. In addition to bubble growth, the collapse, detachment, coalescence, and dispersion of bubbles in liquid under microgravity were also studied in previous works 33 , 34 .…”

Section: Introductionmentioning

confidence: 99%

Bubble nucleation and growth on microstructured surfaces under microgravity

Zhang,

Mo,

Moon

et al. 2024

npj Microgravity

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Understanding the dynamics of surface bubble formation and growth on heated surfaces holds significant implications for diverse modern technologies. While such investigations are traditionally confined to terrestrial conditions, the expansion of space exploration and economy necessitates insights into thermal bubble phenomena in microgravity. In this work, we conduct experiments in the International Space Station to study surface bubble nucleation and growth in a microgravity environment and compare the results to those on Earth. Our findings reveal significantly accelerated bubble nucleation and growth rates, outpacing the terrestrial rates by up to ~30 times. Our thermofluidic simulations confirm the role of gravity-induced thermal convective flow, which dissipates heat from the substrate surface and thus influences bubble nucleation. In microgravity, the influence of thermal convective flow diminishes, resulting in localized heat at the substrate surface, which leads to faster temperature rise. This unique condition enables quicker bubble nucleation and growth. Moreover, we highlight the influence of surface microstructure geometries on bubble nucleation. Acting as heat-transfer fins, the geometries of the microstructures influence heat transfer from the substrate to the water. Finer microstructures, which have larger specific surface areas, enhance surface-to-liquid heat transfer and thus reduce the rate of surface temperature rise, leading to slower bubble nucleation. Our experimental and simulation results provide insights into thermal bubble dynamics in microgravity, which may help design thermal management solutions and develop bubble-based sensing technologies.

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Revisiting the NASA surface tension driven convection experiments

Cited by 6 publications

References 36 publications

Bioprinting of Cardiac Tissue in Space: Where Are We?

Bioprinting of Cardiac Tissue in Space: Where Are We?

Changes in interstitial fluid flow, mass transport and the bone cell response in microgravity and normogravity

Bubble nucleation and growth on microstructured surfaces under microgravity

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