Numerical simulation of bore generation and morphology in thermal and Doppler ducts
We perform a series of numerical simulations employing a model describing nonlinear incompressible dynamics to explore bore generation and morphology for several ducting geometries. These include idealized thermal ducts in close proximity to, and more remote from, reflecting boundaries, an ideal...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-02-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/27/511/2009/angeo-27-511-2009.pdf |
| Summary: | We perform a series of numerical simulations employing a model describing
nonlinear incompressible dynamics to explore bore generation and morphology
for several ducting geometries. These include idealized thermal ducts in
close proximity to, and more remote from, reflecting boundaries, an
idealized Doppler duct remote from boundaries, and a combination of thermal
and Doppler ducts at nearby altitudes. Based on observed bore environments,
we assume initial long-wave perturbations having sinusoidal form and large
amplitudes. Results indicate that close proximity of a duct to reflecting
boundaries enhances bore development, that both thermal and Doppler ducts
support bore development for long-wave perturbations of sufficiently large
amplitudes, and that bore structures and evolutions exhibit both features
anticipated by idealized bore theory and departures that remain to be
explored in detail. |
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| ISSN: | 0992-7689 1432-0576 |