Preparation of JEREMI Experiment: Development of the Ground Based Prototype

Yasnou, Viktar; Mialdun, Aliaksndr; Shevtsova, Valentina

doi:10.1007/s12217-012-9314-9

Cited by 8 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To establish a LB, the required volume of a liquid is injected through a small channel in the bottom rod using a syringe pump. The LB filled with -decane is slightly evaporating and the evaporation rate increases with the increase of gas velocity (Yasnou, Mialdun & Shevtsova 2012). The volume of the LB was controlled using an optical visualization of its shape.…”

Section: Methodsmentioning

confidence: 99%

Hydrothermal waves in a liquid bridge subjected to a gas stream along the interface

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Hydrothermal waves in a liquid bridge subjected to a gas stream along the interface

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Its significance is also reflected by the scatter of critical Reynolds numbers for the onset of hydrothermal waves in high-Prandtl-number liquid bridges obtained in different experiments and by different investigators. The sensitivity with respect to the thermal conditions in the ambient atmosphere has been proposed to be utilised for controlling the onset of oscillations by exposing the liquid bridge to a well-defined gas flow (Yasnou, Mialdun & Shevtsova 2012). This problem has also been the subject of the Japanese-European Research and Experiments on Marangoni Instability (JEREMI) collaboration which was aimed at an experiment on the International Space Station (Shevtsova et al 2014).…”

Section: Liquidmentioning

confidence: 99%

High-Prandtl-number thermocapillary liquid bridges with dynamically deformed interface: effect of an axial gas flow on the linear stability

Stojanović,

Romanò,

Kuhlmann

2024

J. Fluid Mech.

View full text Add to dashboard Cite

The linear stability of the axisymmetric steady flow in a thermocapillary liquid bridge made from 2-cSt silicone oil $({Pr}=28)$ is investigated numerically. The liquid bridge is heated either from above or below and exposed to an axial air flow which is confined to a concentric tube surrounding the bridge. At the annular inlet, the air flow is fully developed and has the same temperature as the adjacent support rod. Using an extended Oberbeck–Boussinesq approximation in which the density of both fluids depends linearly on the temperature in all equations, critical thermocapillary Reynolds numbers are obtained depending on the strength of the imposed axial air flow. The critical conditions are sensitive with respect to the direction of a weak air flow, because the air flow changes the plateau value of the interfacial temperature midway between the hot and cold ends. For stronger air flow the critical thermocapillary Reynolds number almost saturates at moderate values. Throughout, the instability arises as a hydrothermal wave with the gas phase being passive. The dynamic interface deformations for axisymmetric flow caused by the thermocapillarity flow in the liquid and by the stresses from the air flow are considered separately. Apart from turning points of the critical curve, the impact of dynamic surface deformations on the critical thermocapillary Reynolds number is moderate.

show abstract

“…The liquid bridge was formed by n-decane (molecular formula C 10 H 22 with properties are listed in Table 1), which is an evaporating liquid (Yasnou et al 2012;Melnikov et al 2013a). The evaporation rate was monitored using the same approach as in Melnikov et al (2013a) and a reduction in volume was compensated by re-filling using a computer …”

Section: Experimental Apparatus and Conditionsmentioning

confidence: 99%

Experimental Study on Formation of Particle Accumulation Structures by a Thermocapillary Flow in a Deformable Liquid Column

Melnikov

Watanabe

Matsugase

et al. 2014

Microgravity Sci. Technol.

Self Cite

View full text Add to dashboard Cite

A series of experiments has been performed under earth's gravity to study formation of particle accumulation structures (PAS) in a supercritical flow driven by the combined effects of buoyancy and thermocapillary forces. The test flow was created in a non-isothermal cylindrical column (liquid bridge) made of n-decane and heated from above. The objective of the experiment was to answer two major questions: (1) how strong is the influence of the shape of the interface on the process of formation of PAS;(2) what temperature of the ambient air fits better for PAS to occur. Considering these questions, we developed a method based on changing both the volume of the liquid bridge and temperature at the external walls of the experimental chamber to set and to keep constant the shape of the interface and the temperature inside the setup, respectively. The experimental observations are presented in the form of diagrams in the parameters' space showing ranges of the PAS formation. The findings show that a liquid bridge with an interface as close to the straight cylindrical as possible and surrounded by air at low temperature is the best terrain for D. Melnikov ( ) · V. Shevtsova Université Libre de Bruxelles (ULB), MRC, CP-165/62, PAS formation. The results of the chaos analysis of the recorded temperature time series and their correlation with the obtained diagrams allow for showing that accumulation of particles in coherent structures is possible only in a periodic oscillatory flow characterized by a small value of the translation error not exceeding 0.01. It is demonstrated that presence of either any spectral noise or of several modes with incommensurate frequencies makes formation of a PAS impossible.

show abstract

Preparation of JEREMI Experiment: Development of the Ground Based Prototype

Cited by 8 publications

References 5 publications

Hydrothermal waves in a liquid bridge subjected to a gas stream along the interface

Hydrothermal waves in a liquid bridge subjected to a gas stream along the interface

High-Prandtl-number thermocapillary liquid bridges with dynamically deformed interface: effect of an axial gas flow on the linear stability

Experimental Study on Formation of Particle Accumulation Structures by a Thermocapillary Flow in a Deformable Liquid Column

Contact Info

Product

Resources

About