Flight results on Marangoni flow instability in liquid bridges

R. Monti, R. Savino, M. Lappa, L. Carotenuto, D. Castagnolo, R. Fortezza

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper reports on the results of the experiment PULSAR (Pulsating and Rotating Instabilities in Oscillatory Marangoni Flows), performed on the MAXUS 3 Sounding Rocket launched last November from the Swedish base in Kiruna. Aim of the experiment was the study of the oscillatory Marangoni convection in a cylindrical liquid bridge of silicone oil with kinematic viscosity of 5cSt. The experiment was motivated by preliminary on-ground numerical simulations and microscale experimental studies, that have pointed out that the oscillatory Marangoni instability appears at the beginning in the form of a pulsating regime, caused by a hydro-thermal standing wave, and then it turns to a rotating regime, caused by a traveling wave. The height of the bridge was equal to the disk diameter (20mm), and the imposed temperature difference was 15K during the first 460 s and 20K in the second part of the experiment, until the end of the microgravity period. The analysis of the temperature profiles, measured by thermocouples located near the disks at the same radial and axial coordinate but at different azimuthal coordinates (shifted at 90°), and the surface temperature distribution, measured by an infrared thermocamera, show that a pulsating and a mixed pulsating-rotating regimes have been established during the experiment. Unfortunately during the flight the accelerations level caused by two centrifuges with some biological samples in an adjacent module were above the expected values, so that disturbing g-jitter were encountered at different times during the microgravity mission. The effecst are clearly visible and the numerical simulations had to make different assumptions to correlate the experimental results.
LanguageEnglish
Pages325-334
Number of pages10
JournalActa Astronautica
Volume47
Issue number2-9
DOIs
Publication statusPublished - 30 Nov 2000

Fingerprint

Liquids
Microgravity
Experiments
Sounding rockets
Centrifuges
Computer simulation
Thermocouples
Jitter
Silicones
Temperature distribution
Viscosity
Infrared radiation
Temperature
Hot Temperature
Oils
Convection

Keywords

  • PULSAR
  • MAXUS 3 sounding rocket
  • Marangoni convection

Cite this

Monti, R., Savino, R., Lappa, M., Carotenuto, L., Castagnolo, D., & Fortezza, R. (2000). Flight results on Marangoni flow instability in liquid bridges. Acta Astronautica, 47(2-9), 325-334. https://doi.org/10.1016/S0094-5765(00)00074-6
Monti, R. ; Savino, R. ; Lappa, M. ; Carotenuto, L. ; Castagnolo, D. ; Fortezza, R. / Flight results on Marangoni flow instability in liquid bridges. In: Acta Astronautica. 2000 ; Vol. 47, No. 2-9. pp. 325-334.
@article{e7a8326d1e8e4e11b07d775d447319da,
title = "Flight results on Marangoni flow instability in liquid bridges",
abstract = "This paper reports on the results of the experiment PULSAR (Pulsating and Rotating Instabilities in Oscillatory Marangoni Flows), performed on the MAXUS 3 Sounding Rocket launched last November from the Swedish base in Kiruna. Aim of the experiment was the study of the oscillatory Marangoni convection in a cylindrical liquid bridge of silicone oil with kinematic viscosity of 5cSt. The experiment was motivated by preliminary on-ground numerical simulations and microscale experimental studies, that have pointed out that the oscillatory Marangoni instability appears at the beginning in the form of a pulsating regime, caused by a hydro-thermal standing wave, and then it turns to a rotating regime, caused by a traveling wave. The height of the bridge was equal to the disk diameter (20mm), and the imposed temperature difference was 15K during the first 460 s and 20K in the second part of the experiment, until the end of the microgravity period. The analysis of the temperature profiles, measured by thermocouples located near the disks at the same radial and axial coordinate but at different azimuthal coordinates (shifted at 90°), and the surface temperature distribution, measured by an infrared thermocamera, show that a pulsating and a mixed pulsating-rotating regimes have been established during the experiment. Unfortunately during the flight the accelerations level caused by two centrifuges with some biological samples in an adjacent module were above the expected values, so that disturbing g-jitter were encountered at different times during the microgravity mission. The effecst are clearly visible and the numerical simulations had to make different assumptions to correlate the experimental results.",
keywords = "PULSAR, MAXUS 3 sounding rocket, Marangoni convection",
author = "R. Monti and R. Savino and M. Lappa and L. Carotenuto and D. Castagnolo and R. Fortezza",
year = "2000",
month = "11",
day = "30",
doi = "10.1016/S0094-5765(00)00074-6",
language = "English",
volume = "47",
pages = "325--334",
journal = "Acta Astronautica",
issn = "0094-5765",
number = "2-9",

}

Monti, R, Savino, R, Lappa, M, Carotenuto, L, Castagnolo, D & Fortezza, R 2000, 'Flight results on Marangoni flow instability in liquid bridges' Acta Astronautica, vol. 47, no. 2-9, pp. 325-334. https://doi.org/10.1016/S0094-5765(00)00074-6

Flight results on Marangoni flow instability in liquid bridges. / Monti, R.; Savino, R.; Lappa, M.; Carotenuto, L.; Castagnolo, D.; Fortezza, R.

In: Acta Astronautica, Vol. 47, No. 2-9, 30.11.2000, p. 325-334.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Flight results on Marangoni flow instability in liquid bridges

AU - Monti, R.

AU - Savino, R.

AU - Lappa, M.

AU - Carotenuto, L.

AU - Castagnolo, D.

AU - Fortezza, R.

PY - 2000/11/30

Y1 - 2000/11/30

N2 - This paper reports on the results of the experiment PULSAR (Pulsating and Rotating Instabilities in Oscillatory Marangoni Flows), performed on the MAXUS 3 Sounding Rocket launched last November from the Swedish base in Kiruna. Aim of the experiment was the study of the oscillatory Marangoni convection in a cylindrical liquid bridge of silicone oil with kinematic viscosity of 5cSt. The experiment was motivated by preliminary on-ground numerical simulations and microscale experimental studies, that have pointed out that the oscillatory Marangoni instability appears at the beginning in the form of a pulsating regime, caused by a hydro-thermal standing wave, and then it turns to a rotating regime, caused by a traveling wave. The height of the bridge was equal to the disk diameter (20mm), and the imposed temperature difference was 15K during the first 460 s and 20K in the second part of the experiment, until the end of the microgravity period. The analysis of the temperature profiles, measured by thermocouples located near the disks at the same radial and axial coordinate but at different azimuthal coordinates (shifted at 90°), and the surface temperature distribution, measured by an infrared thermocamera, show that a pulsating and a mixed pulsating-rotating regimes have been established during the experiment. Unfortunately during the flight the accelerations level caused by two centrifuges with some biological samples in an adjacent module were above the expected values, so that disturbing g-jitter were encountered at different times during the microgravity mission. The effecst are clearly visible and the numerical simulations had to make different assumptions to correlate the experimental results.

AB - This paper reports on the results of the experiment PULSAR (Pulsating and Rotating Instabilities in Oscillatory Marangoni Flows), performed on the MAXUS 3 Sounding Rocket launched last November from the Swedish base in Kiruna. Aim of the experiment was the study of the oscillatory Marangoni convection in a cylindrical liquid bridge of silicone oil with kinematic viscosity of 5cSt. The experiment was motivated by preliminary on-ground numerical simulations and microscale experimental studies, that have pointed out that the oscillatory Marangoni instability appears at the beginning in the form of a pulsating regime, caused by a hydro-thermal standing wave, and then it turns to a rotating regime, caused by a traveling wave. The height of the bridge was equal to the disk diameter (20mm), and the imposed temperature difference was 15K during the first 460 s and 20K in the second part of the experiment, until the end of the microgravity period. The analysis of the temperature profiles, measured by thermocouples located near the disks at the same radial and axial coordinate but at different azimuthal coordinates (shifted at 90°), and the surface temperature distribution, measured by an infrared thermocamera, show that a pulsating and a mixed pulsating-rotating regimes have been established during the experiment. Unfortunately during the flight the accelerations level caused by two centrifuges with some biological samples in an adjacent module were above the expected values, so that disturbing g-jitter were encountered at different times during the microgravity mission. The effecst are clearly visible and the numerical simulations had to make different assumptions to correlate the experimental results.

KW - PULSAR

KW - MAXUS 3 sounding rocket

KW - Marangoni convection

UR - http://www.sciencedirect.com/science/journal/00945765

U2 - 10.1016/S0094-5765(00)00074-6

DO - 10.1016/S0094-5765(00)00074-6

M3 - Article

VL - 47

SP - 325

EP - 334

JO - Acta Astronautica

T2 - Acta Astronautica

JF - Acta Astronautica

SN - 0094-5765

IS - 2-9

ER -

Monti R, Savino R, Lappa M, Carotenuto L, Castagnolo D, Fortezza R. Flight results on Marangoni flow instability in liquid bridges. Acta Astronautica. 2000 Nov 30;47(2-9):325-334. https://doi.org/10.1016/S0094-5765(00)00074-6