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|One dimensional dynamics in locally heated liquid layers|
|Authors: ||Burguete, J. (J.)|
Maza, D. (Diego)
Mancini, H.L. (Héctor Luis)
|Issue Date: ||2003|
|Citation: ||J. Burguete, D. Maza, H.L. Mancini. “One dimensional dynamics in locally heated liquid layers”. Physica D, 174 p. 56-70, (2002).|
Recent results on one-dimensional patterns in locally heated experiments are presented. A fluid layer is heated locally by
a nearly one-dimensional heater, and subjected to both horizontal and vertical temperature gradients. Depending on the fluid
depth and on the temperature difference established across the layer different convective regimes appear. When a very small
temperature gradient is applied a basic convective state appears. It consists of two big rolls parallel to the heater and filling the
convective cell.Aprimary instability in the homogeneous basic flowgives rise to a one-dimensional cellular stationary pattern.
For higher values of the control parameters, time-dependent patterns appear through a secondary instability. Various regimes
are analyzed: oscillations, traveling waves and alternating patterns. The hydrodynamic characteristics of these patterns are
provided. Local temperature measurements allows to describe the physical mechanisms responsible for the instabilities. The
similarities and discrepancies of the experimental data with some theoretical models are provided.
|Permanent link: ||http://hdl.handle.net/10171/1604|
|Appears in Collections:||DA - Ciencias - Física - Artículos de Revista|
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