Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 5: Convection

DY 5.9: Vortrag

Montag, 1. April 2019, 12:30–12:45, H3

Heat and momentum transport in symmetric horizontal convection — •Philipp Reiter, Mohammad Emran, and Olga Shishkina — Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, 37077 Göttingen, Germany

Horizontal convection (HC) is a paradigm system to study natural turbulent convection, in which heating and cooling is applied solely to one horizontal surface of a fluid layer. This type of convection is relevant in different geophysical and astrophysical systems, e.g., in the meridional-overturning circulation of the oceans. Recent progress in understanding of the scaling relations of the mean heat and momentum transport has been done theoretically (Shishkina et al., Geophys. Res. Lett 43(2016)) and numerically, but further investigations are required.

Here, using an advanced version of the computational code goldfish, we investigate a modified symmetric elongated HC setup, where heat is applied to the central part of the bottom plate and cooling to both ends of the HC cell. Such meridional symmetry bypasses some difficulties that arise in the measurements in the classical configuration and it leads to a more natural setup with less artificial constraints. For the modified and classical HC, we compare global flow structures and their time evolution, as well as the scaling relations, over a wide range of Rayleigh numbers.

This work is supported by the DFG grants Sh405/10 and Sh405/4.