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Mesogranular structure in a hydrodynamical simulation

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posted on 2010-09-10, 00:00 authored by Matloch, R Cameron, Sergiy ShelyagSergiy Shelyag, D Schmitt, M Schüssler
Aims. We analyse mesogranular flow patterns in a three-dimensional hydrodynamical simulation of solar surface convection in order to determine its characteristics. Methods. We calculate divergence maps from horizontal velocities obtained with the local correlation tracking (LCT) method. Mesogranules are identified as patches of positive velocity divergence. We track the mesogranules to obtain their size and lifetime distributions. We vary the analysis parameters to verify if the pattern has characteristic scales. Results. The characteristics of the resulting flow patterns depend on the averaging time and length used in the analysis. Conclusions. We conclude that the mesogranular patterns do not exhibit intrinsic length and time scales. © 2010 ESO.

History

Journal

Astronomy and Astrophysics

Volume

519

Location

London, Eng.

Open access

  • Yes

ISSN

0004-6361

eISSN

1432-0746

Publication classification

CN.1 Other journal article

Issue

5

Publisher

EDP Sciences

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