Physical optics treatment of the shadowgraph
We present an analysis of the shadowgraph method of visualizing convective flows based on physical optics, treating the refractive-index perturbation caused by the flow as a transmission grating. Various patterns in thermal convection of an isotropic fluid as well as normal rolls in electroconvectio...
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| Veröffentlicht in: | Physics of fluids (1994) 2002-04, Vol.14 (4), p.1340-1363 |
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| container_end_page | 1363 |
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| container_title | Physics of fluids (1994) |
| container_volume | 14 |
| creator | Trainoff, Steven P. Cannell, David S. |
| description | We present an analysis of the shadowgraph method of visualizing convective flows based on physical optics, treating the refractive-index perturbation caused by the flow as a transmission grating. Various patterns in thermal convection of an isotropic fluid as well as normal rolls in electroconvection of a nematic liquid crystal are considered. The results differ significantly from those of geometrical optics, showing that use of the shadowgraph as a quantitative tool for amplitude measurements should not, in general, be based on geometrical optics. |
| doi_str_mv | 10.1063/1.1449892 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 1070-6631 |
| ispartof | Physics of fluids (1994), 2002-04, Vol.14 (4), p.1340-1363 |
| issn | 1070-6631 1089-7666 |
| language | eng |
| recordid | cdi_scitation_primary_10_1063_1_1449892 |
| source | AIP Journals Complete; AIP Digital Archive |
| title | Physical optics treatment of the shadowgraph |
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