See user documentation for more information on all the possible parameters. Once the mesh is done, the user just have to write a JSON text file to give each material parameters for each regions. geo script to generate numbered surface and volume regions. Since feellgood needs regions to define boundary conditions, it is necessary to use a. \( M_s \), \( \alpha \), and other parameters such as anisotropy constants are provided here. In a separate JSON file, you will provide all the parameters that describe your material in accordance with the region numbering system of gmsh. Generally speaking, a micromagnetic simulation should not depend on the mesh, so it is recommended to check the results with different meshes, and/or various meshing techniques: extrusion, 3D meshing, or others. curved geometries must be properly meshed to avoid eventual artificial surface charges.average size of the tetrahedrons should be smaller than the exchange length.
BUILD GMSH LINUX CODE
We provide the source code of a simple tool to apply the reverse Cuthill-McKee algorithm on a mesh file in the sub directory /tools/rev_CMK. take care of the indices of the nodes: be sure to apply an algorithm to reduce the node index bandwidth, such as Cuthill-McKee algorithm.Usual other recommendations while meshing also apply while solving LLG with finite element method: It is strongly recommended to use a constant density of tetrahedrons in the material, since it is well known that domain-walls would be strongly affected in their motion if non-uniform meshing was used. Gmsh myFile.geo -3 -format msh22 -o myMesh.msh
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