Transparent (absorbing) boundary conditions for the MHD equations

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Video in TIB AV-Portal: Transparent (absorbing) boundary conditions for the MHD equations

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Title
Transparent (absorbing) boundary conditions for the MHD equations
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License
CC Attribution - NonCommercial - ShareAlike 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this license.
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Release Date
2003
Language
Silent film
Production Place
Freiburg

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Subject Area
Abstract
In this video you can see numerical solutions of the time dependent MHD equations. In the first column on the left you see the solution in a large domain. In order to reduce the numerical cost we want to solve the problem on a smaller domain with suitable boundary conditios on the upper boundary , such that the solution on the smaller domain is close to the solution of the larger domain (first column). In the fourth column (A) we have used absorbing boundary conditions and it turns out that the solution is close to the solution in the larger domain in the first column. In the second (D) and the third column (N) you can see the solutions for Dirichlet and Neumann boundary conditions, respectively. The result is much worse.
Keywords MHD transparent boundary conditions numerics Computational fluid dynamics
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