Supergranulation Scale Solar Convection Simulations

Details Supergranulation Scale Solar Convection Simulations Supergranulation Scale Solar Convection Simulations

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517401b&link_type=abstract

American Astronomical Society Meeting 205, #174.01; Bulletin of the American Astronomical Society, Vol. 37, p.377

Astronomy and Astrophysics

Astronomy

Scientific paper

Solar convection simulations have been started on small supergranulation scales of 24 x 24 Mm x 9 Mm deep. The initial state was made by duplicating a periodic smaller simulation of 12 x 12 Mm x 9 Mm deep and adding a small velocity perturbation. This state has now relaxed for about 2 hours. Near the surface, the initial pattern has disappeared, but in deeper layers the predominant duplication in each horizontal direction is still present. We estimate it will take about width/horizontal velocity at depth = 24 Mm / (0.15 km/s) = 43 hours to dynamically relax and develop structures on the scale of 24 Mm. Since this is the size of small supergranules, we expect that one of these will eventually develop after a few turnover times. The evolution of the convective structure at various depths is shown.
Eventually, a region 48 x 48 Mm x 18 Mm deep will be simulated. This will help separate the role of the second helium ionization zone from the effect of the increasing scale height with depth. This large size is also necessary for analyzing local helioseismic inversion techniques. Coriolis forces become significant on these spatio-temporal scales. We will investigate the surface shear layer that should develop with the inclusion of f-plane rotation. Finally, magnetic fields will be added to study the development and maintenance of the magnetic network.
This work is supported by NASA grants NAG 512450 and NNG046-B92G and NSF grant AST0205500.

Affiliated with

Also associated with

No associations

Rating

Supergranulation Scale Solar Convection Simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Supergranulation Scale Solar Convection Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supergranulation Scale Solar Convection Simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1645662