The physical and mathematical models of the Marangoni convection of KF-96 silicone oil and FC-70 fluorinart in an encapsulated liquid bridge were established. To contrast to this configuration, the Marangoni convection of KF-96 silicone oil in a liquid bridge was also studied in present work. We conducted a series of unsteady two-dimensional numerical simulations. Simulation conditions correspond to those in the experiments of Majima and Kawamura (2001). The simulation results with large Marangoni number (Ma) predicted oscillatory flows under microgravity. The critical conditions for the onset oscillatory flow were determined and compared with the experimental results. Details of the flow and temperature fields were discussed. Oscillation frequencies were also exhibited.

1.
Kamotani
Y.
,
Ostrach
S.
,
Vargas
M.-V.
,
Oscillatory thermocapillary convection in a simulated floating-zone configuration
,
J. Crystal Growth
66
(
1984
)
83
90
.
2.
Velten
R.
,
Schwabe
D.
,
Scharmann
A.
,
The periodic instability of thermocapillary convection in cylindrical liquid bridges
,
Phys. Fluids
3
(
1991
)
267
279
.
3.
Schwabe
D.
,
Scharmann
A.
,
Some Evidence for the existence and magnitude of a critical Marangoni number for the one set of oscillatory flow in crystal growth melt
,
J. Crystal Growth
46
(
1979
)
125
131
.
4.
Neitzel
G.-P.
,
Law
C.-C.
,
Jankowski
D.-F.
,
Mittelmann
H.-D.
,
Energy stability of thermocapillary convection in a model of the float-zone crystal growth process, Part 2: Non-axisymmetric disturbance
,
Phys. Fluids
3
(
1991
)
2841
2846
.
5.
Neitzel
G.-P.
,
Chang
K.-T.
,
Law
C.-C.
,
Jankowski
D.-F.
,
Mittelmann
H.-D.
,
Linear stability theory of thermocapillary convection in a model of the float-zone crystal-growth process
,
Phys. Fluids
5
(
1993
)
108
114
.
6.
Wanschura
M.
,
Shevtsova
V.-M.
,
Kuhlmann
H.-C.
,
Rath
H.-J.
,
Convective instability mechanisms in thermocapillary liquid bridges
,
Phys. Fluids
7
(
1995
)
912
925
.
7.
Chen
G.
,
Liz
F.-A.
,
Roux
B.
,
Bifurcation analysis of the thermocapillary convection in cylindrical liquid bridge
,
J. Crystal Growth
180
(
1997
)
638
647
.
8.
Rupp
R.
,
Mueller
G.
,
Neumann
G.
,
Three dimensional time dependent modeling of the Marangoni convection in zone melting configurations for GaAs
,
J. Crystal Growth
97
(
1989
)
34
41
.
9.
Savino
R.
,
Monti
R.
,
Oscillatory Marangoni convection in cylindrical liquid bridge
,
Phys. Fluids
8
(
1996
)
2906
2922
.
10.
Yasuhiro
S.
,
Sato
T.
,
Imaishi
N.
,
Three dimensional oscillatory Marangoni flow in half-zone of Pr=1.02 fluid
,
Microgravity Sci. Technol.
X/3
(
1997
)
144
153
.
11.
Imaishi
N.
,
Yasuhiro
S.
,
Sato
T.
,
Yoda
S.
,
Numerical simulation of oscillatory Marangoni flow in half-zone liquid bridge of low Prantal number fluid
,
J. Crystal Growth
230
(
2001
)
164
171
.
12.
Doi
T.
,
Koster
J.-N.
,
Thermocapillary convection in two immiscible liquid layers with free surface
,
Phys. Fluids
5
(
1993
)
1914
1927
.
13.
Prakash
A.
,
Otsubo
F.
,
Kuwahara
K.
,
Doi
T.
,
Hydrostatic stability of concentric two-liquid columns
,
Microgravity Sci. Technol.
9
(
1996
)
70
79
.
14.
Majima
S.
,
Kawamura
H.
,
Oscillatory thermocapillary flow in encapsulated liquid column
,
Phys. Fluids
13
(
2001
)
1517
1520
.
This content is only available via PDF.
You do not currently have access to this content.