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Resolution Dependence of Magnetorotational Turbulence in the Isothermal Stratified Shearing Box
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ryan, B. Gammie, Charles F. Fromang, Sébastien |
| Copyright Year | 2016 |
| Abstract | Magnetohydrodynamic (MHD) turbulence driven by the magnetorotational instability can provide diffusive transport of angular momentum in astrophysical disks, and a widely studied computational model for this process is the ideal, stratified, isothermal shearing box. Here we report results of a convergence study of such boxes up to a resolution of N = 256 zones per scale height, performed on blue waters at NCSA with ramses-gpu. We find that the time and vertically integrated dimensionless shear stress α ∼ N−1/3, i.e. the shear stress is resolution dependent. We also find that the magnetic field correlation length decreases with resolution, λ ∼ N−1/2. This variation is strongest at the disk midplane. We show that our measurements of α are consistent with earlier studies. We discuss possible reasons for the lack of convergence. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://rainman.astro.illinois.edu/gammie/papers/convergence.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | AngularJS Blue Waters Box Computation Computational model Convergence (action) GPU cluster Instability Magnetic Fields National Center for Supercomputing Applications Turbulence Water shear stress |
| Content Type | Text |
| Resource Type | Article |
