𝔖 Bobbio Scriptorium
✦   LIBER   ✦

TWO-DIMENSIONAL SOLUTIONS OF MHD EQUATIONS WITH AN ADAPTED ROE METHOD

✍ Scribed by NECDET ASLAN


Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
674 KB
Volume
23
Category
Article
ISSN
0271-2091

No coin nor oath required. For personal study only.

✦ Synopsis


In this paper a higher-order Godunov method for two-dimensional solutions of the ideal MHD (magnetohydrodynamic) equations is presented. The method utilizes the finite volume approach with quadrilateral cells. In Section 2 the MHD equations (including flux and source terms) in conservative form are given. The momentum flux is rearranged such that while a source vector is produced, the eigenstructure of the Jacobian matrix does not change. This rearrangement allows a full Roe averaging of the density, velocity and pressure for any value of adiabatic index (contrary to Brio and Wu's conclusion (J. Comput. Phys., 75, 400 (1 988)). Full Roe averaging for the magnetic field is possible only when the normal gradient of the magnetic field is negligible; otherwise an arithmetic averaging can be used. This new procedure to get Roe-averaged MHD fields at the interfaces between left and right states has been presented by Aslan (Ph.D. Thesis, University of Michigan, 1993; Znf.j. numer. rnetkorkrfluids, 22,569-580 (1996)). This section also includes the shock structure and an eigensystem for MHD problems. The eigenvalues, right eigenvectors and wave strengths for MHD are given in detail to provide the reader with a full description. The second-order, limited finite volume approach which utilizes quadrilateral cells is given in full detail in Section 3. Section 4 gives one-and two-dimensional numerical results obtained from this method. Finally, conclusions are given in Section 5.


📜 SIMILAR VOLUMES


An Adaptive Spline Wavelet ADI (SW-ADI)
✍ Wei Cai; Wu Zhang 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 404 KB

We study a spline wavelet alternative direction implicit (SW-ADI) algorithm for solving two-dimensional reaction diffusion equations. This algorithm is based on a collocation method for PDEs with a specially designed spline wavelet for the Sobolev space H 2 (I ) on a closed interval I. By using the

Numerical solutions of two-dimensional B
✍ Hongqing Zhu; Huazhong Shu; Meiyu Ding 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 746 KB

In this paper, the discrete Adomian decomposition method (ADM) is proposed to numerically solve the two-dimensional Burgers' nonlinear difference equations. Two test problems are considered to illustrate the accuracy of the proposed discrete decomposition method. It is shown that the numerical resul

METHOD–OF–LINES SOLUTION OF TIME–DEPENDE
✍ OLCAY OYMAK; NEVÍN SELÇUK 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 619 KB

A novel approach to the development of a code for the solution of the time-dependent two-dimensional Navier-Stokes equations is described. The code involves coupling between the method of lines (MOL) for the solution of partial differential equations and a parabolic algorithm which removes the neces