3D convection simulations of the outer layers of the Sun using realistic physics

Details 3D convection simulations of the outer layers of the Sun using realistic physics 3D convection simulations of the outer layers of the Sun using realistic physics

2002-12-12

arxiv.org/abs/astro-ph/0212296v1

Mon.Not.Roy.Astron.Soc. 340 (2003) 923

Astronomy and Astrophysics

Astrophysics

16 pages, 22 figures, mnras style file (mn.sty), accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2003.06349.x

This paper describes a series of 3D simulations of shallow inefficient convection in the outer layers of the Sun. The computational domain is a closed box containing the convection-radiation transition layer, located at the top of the solar convection zone. The most salient features of the simulations are that: i)The position of the lower boundary can have a major effect on the characteristics of solar surface convection (thermal structure, kinetic energy and turbulent pressure). ii)The width of the box has only a minor effect on the thermal structure, but a more significant effect on the dynamics (rms velocities). iii)Between the surface and a depth of 1 Mm, even though the density and pressure increase by an order of magnitude, the vertical correlation length of vertical velocity is always close to 600 km. iv) In this region the vertical velocity cannot be scaled by the pressure or the density scale height. This casts doubt on the applicability of the mixing length theory, not only in the superadiabatic layer, but also in the adjacent underlying layers. v) The final statistically steady state is not strictly dependent on the initial atmospheric stratification.

Affiliated with

Also associated with

No associations

Rating

3D convection simulations of the outer layers of the Sun using realistic physics 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 3D convection simulations of the outer layers of the Sun using realistic physics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3D convection simulations of the outer layers of the Sun using realistic physics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-403956