Abstract
The paper presents a comparative and critical analysis of some theoretical/experimental/numerical arguments concerning the possible stabilization of the surface-tension-driven (Marangoni) flow in the Floating
Zone technique and in various related fluid-dynamic models. It is conceived as a natural extension of the focused overview published in Cryst. Res. Tech. 40(6),
531, (2005) where much room was devoted to discuss the intrinsic physical mechanisms responsible for threedimensional and oscillatory flows in a variety of technological processes. Here, a significant effort is provided to illustrate the genesis of possible control strategies (many of which are still in a very embryonic condition), the underlying ideas, the governing nondimensional
parameters, the scaling properties. Particular attention is devoted to their range of applicability that is still the subject of controversies in the literature. The
discussion is supported by some novel numerical results. These simulations are used to provide additional insights into the physics of problems where experimental data are not available.
Zone technique and in various related fluid-dynamic models. It is conceived as a natural extension of the focused overview published in Cryst. Res. Tech. 40(6),
531, (2005) where much room was devoted to discuss the intrinsic physical mechanisms responsible for threedimensional and oscillatory flows in a variety of technological processes. Here, a significant effort is provided to illustrate the genesis of possible control strategies (many of which are still in a very embryonic condition), the underlying ideas, the governing nondimensional
parameters, the scaling properties. Particular attention is devoted to their range of applicability that is still the subject of controversies in the literature. The
discussion is supported by some novel numerical results. These simulations are used to provide additional insights into the physics of problems where experimental data are not available.
| Original language | English |
|---|---|
| Pages (from-to) | 171-188 |
| Number of pages | 18 |
| Journal | Fluid Dynamics and Materials Processing |
| Volume | 1 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2005 |
Keywords
- floating zone technique
- Marangoni flow
- convective instabilities
- thermal feedback control
- magnetic fields
- forced high-frequency vibrations
- thermovibrational effects