Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

This paper reports on the preliminary 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 attention has been focused on the three dimensional flow structure that is established in the liquid bridge when the temperature difference between the end disks supporting the bridge exceeds a certain critical value. 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 preliminary analysis of the temperature profiles, measured by four thermocouples located 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. The azimuthal wave number of the oscillatory regime, the oscillation period, the time for the onset of the oscillations are in good agreement with the numerical predictions obtained in the pre-flight analysis. The experiment was fully controlled in Telescience mode by the MARS Center remote control room by using four dedicated ISDN lines.
LanguageEnglish
Title of host publicationBiennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).
Number of pages1
Publication statusPublished - 28 Feb 1999
EventBiennial Meeting of the European Low Gravity Research Association, 1999 - Rome, Italy
Duration: 28 Feb 19993 Mar 1999

Other

OtherBiennial Meeting of the European Low Gravity Research Association, 1999
CountryItaly
CityRome
Period28/02/993/03/99

Fingerprint

liquid bridges
sounding rockets
preflight analysis
temperature gradients
MARS (Manned Reusable Spacecraft)
Marangoni convection
remote control
oscillations
three dimensional flow
silicones
thermocouples
microgravity
standing waves
traveling waves
microbalances
temperature profiles
surface temperature
rooms
temperature distribution
kinematics

Keywords

  • MAXUS 3
  • PULSAR
  • Marangoni convection
  • liquid bridge
  • numerical simulations

Cite this

Savino, R., Monti, R., Lappa, M., Carotenuto, L., Castagnolo, D., & Fortezza, R. (1999). Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge. In Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).
Savino, R. ; Monti, R. ; Lappa, M. ; Carotenuto, L. ; Castagnolo, D. ; Fortezza, R. / Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge. Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).. 1999.
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abstract = "This paper reports on the preliminary 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 attention has been focused on the three dimensional flow structure that is established in the liquid bridge when the temperature difference between the end disks supporting the bridge exceeds a certain critical value. 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 preliminary analysis of the temperature profiles, measured by four thermocouples located 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. The azimuthal wave number of the oscillatory regime, the oscillation period, the time for the onset of the oscillations are in good agreement with the numerical predictions obtained in the pre-flight analysis. The experiment was fully controlled in Telescience mode by the MARS Center remote control room by using four dedicated ISDN lines.",
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Savino, R, Monti, R, Lappa, M, Carotenuto, L, Castagnolo, D & Fortezza, R 1999, Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge. in Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).. Biennial Meeting of the European Low Gravity Research Association, 1999, Rome, Italy, 28/02/99.

Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge. / Savino, R.; Monti, R.; Lappa, M.; Carotenuto, L.; Castagnolo, D.; Fortezza, R.

Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).. 1999.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

TY - GEN

T1 - Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge

AU - Savino, R.

AU - Monti, R.

AU - Lappa, M.

AU - Carotenuto, L.

AU - Castagnolo, D.

AU - Fortezza, R.

PY - 1999/2/28

Y1 - 1999/2/28

N2 - This paper reports on the preliminary 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 attention has been focused on the three dimensional flow structure that is established in the liquid bridge when the temperature difference between the end disks supporting the bridge exceeds a certain critical value. 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 preliminary analysis of the temperature profiles, measured by four thermocouples located 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. The azimuthal wave number of the oscillatory regime, the oscillation period, the time for the onset of the oscillations are in good agreement with the numerical predictions obtained in the pre-flight analysis. The experiment was fully controlled in Telescience mode by the MARS Center remote control room by using four dedicated ISDN lines.

AB - This paper reports on the preliminary 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 attention has been focused on the three dimensional flow structure that is established in the liquid bridge when the temperature difference between the end disks supporting the bridge exceeds a certain critical value. 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 preliminary analysis of the temperature profiles, measured by four thermocouples located 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. The azimuthal wave number of the oscillatory regime, the oscillation period, the time for the onset of the oscillations are in good agreement with the numerical predictions obtained in the pre-flight analysis. The experiment was fully controlled in Telescience mode by the MARS Center remote control room by using four dedicated ISDN lines.

KW - MAXUS 3

KW - PULSAR

KW - Marangoni convection

KW - liquid bridge

KW - numerical simulations

M3 - Conference contribution book

BT - Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).

ER -

Savino R, Monti R, Lappa M, Carotenuto L, Castagnolo D, Fortezza R. Preliminary results of the sounding rocket experiment on oscillatory flows in liquid bridge. In Biennial Meeting of the European Low Gravity Research Association, Rome 28/2 - 3/3 1999, ELGRA News, 21, p. 79 (February 1999).. 1999