| Autor: |
Sergio Hernandez Zapata, Gerardo Ruiz Chavarria, Julio César Rubén Romo Cruz |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Experimental and Computational Fluid Mechanics ISBN: 9783319001159 |
| DOI: |
10.1007/978-3-319-00116-6_33 |
| Popis: |
In a liquid layer of alcohol or another volatile substance a pattern of hydrodynamic cells are formed when relative humidity decreases under a certain threshold. We describe the thermodynamical conditions under which the cells appear. We also study the temperature as a function of the vertical coordinate in the layer and we find that the temperature gradient can not be used to explain the origin of the cells. The deformation of the free surface is determined by the Schlieren technique. For that a sheet of paper with a random pattern of dots is placed in the bottom of the container. Using PIV software the displacement of the dots in the pattern is determined. The statistical study of the displacement allows us to study the slope of the surface and eventually its shape. We calculate the correlation lenght and we find that it is of the order of the size of the cells. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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