We regularize the variable coefficient Helmholtz equations arising from implicit time discretizations for resistive MHD, in a way that leads to a symmetric positive-definite system uniformly in the time step. Standard centered-difference discretizations in space of the resulting PDE leads to a metho
The spectrum of resistive MHD equations
β Scribed by B. Davies
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 293 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0375-9601
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π SIMILAR VOLUMES
The reduced system of non-linear resistive MHD equations is used in the 2-D one helicity approximation in the numerical computations of stationary tearing modes. The critical magnetic Reynolds number S (S = ;/TH where Tj~and TH are, respectively, the characteristic resistive and hydromagnetic times)
The CASTOR (complex AlfvΓ©n spectrum of toroidal plasmas) code computes the entire spectrum of normal-modes in resistive MHD for general tokamak configurations. The applied Galerkin method, in conjunction with a Fourier finite-element discretisation, leads to a large scale eigenvalue problem Ax = Ξ»Bx
Numerical calculations have been performed to study the MilD activity in high-,3 tokamaks such as ISX-B. These initial value calculations build on earlier low ~techniques, but the i3 effects create several new numerical issues. These issues are discussed and resolved. In addition to time-stepping mo