A new model of thermocapillary convection in floating half zone
نویسندگان
چکیده
منابع مشابه
Feedback control of oscillatory thermocapillary convection in a half-zone liquid bridge
Active feedback control was applied to suppress oscillations in thermocapillary convection in a half-zone liquid bridge. The experiment is on a unit-aspect-ratio liquid bridge where the most unstable azimuthal mode has wavenumber 2 when control is absent. Active control was realized by locally modifying the surface temperature using the local temperature measured at different locations fed back...
متن کاملOn the Three-Dimensional Instability of Thermocapillary Convection in Arbitrarily Heated Floating Zones in Microgravity Environment
The three-dimensional instability of the thermocapillary convection in cylindrical undeformable floating zones heated laterally is studied numerically. Different types of the boundary conditions, including radiation heating, linearized radiation and prescribed heat flux are used in the calculation. Stability diagrams showing the Prandtl number dependence of the critical Marangoni numbers that r...
متن کاملStability of Thermocapillary Convection in the Float-Zone Process for the Manufacturing of Semiconductor Crystals
Some of the most challenging eigenvalue problems arise in the stability analysis of solutions to parameter-dependent nonlinear partial diierential equations. Surface tension gradients along the free boundary of the oat-zone in crystal growth give rise to a stationary thermocapillary convection. Loss of stability leads to undesirable material imperfections. Stability analyses employing both ener...
متن کاملActive control of oscillatory thermocapillary convection.
Active control of oscillatory thermocapillary flow was applied in an open cylindrical container filled with silicone oil. Thermocapillary convection was driven by imposing a radial temperature gradient on a flat free surface. The control was realized by locally heating the surface at a single position using the local temperature signal at a different position fed back through a simple algorithm...
متن کاملMultistability of oscillatory thermocapillary convection in a liquid bridge.
A parametric investigation of the onset of chaos in a liquid bridge was numerically carried out for a medium Prandtl number liquid, Pr = 4, and unit aspect ratio under zero-gravity conditions. Spatiotemporal patterns of thermocapillary flow were successively studied beginning from the onset of instability up to the appearance of the nonperiodic flow and further on. Well-tested numerical code is...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Advances in Space Research
سال: 1998
ISSN: 0273-1177
DOI: 10.1016/s0273-1177(98)80030-6