TY - JOUR

T1 - Bubble growth on a single artificial nucleation site near saturation conditions in microgravity

AU - Ronshin, F.

AU - Rednikov, A.

AU - Zorkina, A.

AU - Jambert, J.

AU - Graur, I.

AU - Kabov, O.

AU - Colinet, P.

AU - Tadrist, L.

N1 - The present work has been carried out in the framework of the ESA projects AO-2004-111: BOILING, AO-1999-110: EVAPORATION, and AO-2004096: CONDENSATION. The authors thank RUBI Science Team: P. Stephan and A. Sielaff (coordinators); Technical University of Darmstadt, ITT; Aix-Marseille University, IUSTI; University of Pisa; Institute of Thermal Fluid Dynamics, ENEA; Institut de Mécanique des Fluides de Toulouse; Aristotle University of Thessaloniki; Université libre de Bruxelles, TIPs; University of Ljubljana; Paul Sabatier University, LAPLACE; University of Padova; Kutateladze Institute of Thermophysics, Novosibirsk; Hyogo University; and Kobe University. The authors are grateful to S. Vincent-Bonnieu, D. Mangini, O. Minster, A. Pacros, and B. Tóth (ESA coordinators). The authors also thank AIRBUS (O. Schoele-Schulz's team) and B.USOC (C. Jacobs and D. Van Hoof) for the technical realization. The authors are grateful to Technical University of Darmstadt, ITT (M. Schinnerl and A. Sielaff) for original post-processing of raw data. FR acknowledges IT SB RAS (State Contract No. 122022800489-6) and funding by the Russian Science Foundation, Russia, project No. 21-79-10357 (bubble growth analysis). AR acknowledges the funding from ESA/BELSPO PRODEX Heat Transfer and Evaporation. OK acknowledges funding by the Russian Science Foundation (Project No. 19-19-00695, contact angle phenomena analysis). PC acknowledges the funding from the Fond de la Recherche Scientifique (FNRS). IG and LT acknowledge the CNES (National Centre for Space Studies) and ANR—FRANCE (French National Research Agency) for its financial support of the TraThI (Project No. ANR-21-CE50-0009-01).

PY - 2025

Y1 - 2025

N2 - We analyze pool boiling experiments with single bubbles realized on the International Space Station (ISS) as part of Reference mUltiscale Boiling Investigation (RUBI). Fluorinert FC-72 (pure component) is used as a working liquid. For a fixed liquid pressure (here 500, 600 or 750 mbar), upon initial thermalization, a joule heater coated atop a transparent BaF2 substrate is on. Following a “waiting time” of a few seconds (here 2 or 5 s), a pre-prepared nucleation site is activated by a laser pulse. The resulting bubble growth up to a centimetric size is diagnosed for 9 s by a side-view camera (shape, contact angle) and a bottom-view infrared camera (temperature). Here, we specifically focus on “smooth growth” cases such as low heater power and near-saturation conditions inasmuch as available in RUBI. Although our 500 fps of the camera misses a “zeroth” growth stage (the bubble being of a size of hundreds of micrometers in the first image it appears), the subsequent (first, etc.) stages are well explored. Strong shape oscillations, up to detachment, due to an initial explosive growth (first stage) are followed by a quasi-spherical-cap growth (second and third stages) with different power laws. An efficient minimalistic numerical model based on a spherical-cap approximation is developed. This helps to elucidate the physics behind each observation. A strongly disproportionate contribution of a near-contact-line zone to the evaporation flux is quantified in passing. Upon a limited calibration, in conjunction with a classical “microregion” model, the simulation reproduces well the overall measurements including the evaporation-induced contact angle.

AB - We analyze pool boiling experiments with single bubbles realized on the International Space Station (ISS) as part of Reference mUltiscale Boiling Investigation (RUBI). Fluorinert FC-72 (pure component) is used as a working liquid. For a fixed liquid pressure (here 500, 600 or 750 mbar), upon initial thermalization, a joule heater coated atop a transparent BaF2 substrate is on. Following a “waiting time” of a few seconds (here 2 or 5 s), a pre-prepared nucleation site is activated by a laser pulse. The resulting bubble growth up to a centimetric size is diagnosed for 9 s by a side-view camera (shape, contact angle) and a bottom-view infrared camera (temperature). Here, we specifically focus on “smooth growth” cases such as low heater power and near-saturation conditions inasmuch as available in RUBI. Although our 500 fps of the camera misses a “zeroth” growth stage (the bubble being of a size of hundreds of micrometers in the first image it appears), the subsequent (first, etc.) stages are well explored. Strong shape oscillations, up to detachment, due to an initial explosive growth (first stage) are followed by a quasi-spherical-cap growth (second and third stages) with different power laws. An efficient minimalistic numerical model based on a spherical-cap approximation is developed. This helps to elucidate the physics behind each observation. A strongly disproportionate contribution of a near-contact-line zone to the evaporation flux is quantified in passing. Upon a limited calibration, in conjunction with a classical “microregion” model, the simulation reproduces well the overall measurements including the evaporation-induced contact angle.

UR - https://www.mendeley.com/catalogue/93fb7a29-92b4-330d-9631-633e6db9a367/

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105013309135&origin=inward

U2 - 10.1063/5.0280517

DO - 10.1063/5.0280517

M3 - Article

VL - 37

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 8

M1 - 087165

ER -