CUED Publications database

Baroclinic waves in an air-filled thermally driven rotating annulus.

Castrejón-Pita, AA and Read, PL (2007) Baroclinic waves in an air-filled thermally driven rotating annulus. Phys Rev E Stat Nonlin Soft Matter Phys, 75. 026301-. ISSN 1539-3755

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Abstract

In this study an experimental investigation of baroclinic waves in air in a differentially heated rotating annulus is presented. Air has a Prandtl number of 0.707, which falls within a previously unexplored region of parameter space for baroclinic instability. The flow regimes encountered include steady waves, periodic amplitude vacillations, modulated amplitude vacillations, and either monochromatic or mixed wave number weak waves, the latter being characterized by having amplitudes less than 5% of the applied temperature contrast. The distribution of these flow regimes in parameter space are presented in a regime diagram. It was found that the progression of transitions between different regimes is, as predicted by recent numerical modeling results, in the opposite sense to that usually found in experiments with high Prandtl number liquids. No hysteresis in the flow type, with respect to variations in the rotation rate, was found in this investigation.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:56
Last Modified: 10 Mar 2014 17:14
DOI: