# Meshing Guidelines Regarding Element Sizes

View the meshing guidelines regarding element sizes to prevent warning and errors given by the Solver.

Description | Warning | Error |
---|---|---|

Ratio of the segment length to the wavelength | $l>0.3\lambda $ | $l>0.5\lambda $ |

Ratio of the segment radius to the segment length | $r>0.3l$ | $r>1.0l$ |

Ratio of the triangle area to the wavelength squared (MoM RWG or order 0.5 basis function) | $A>\frac{1}{30}{\lambda}^{2}$ | $A>\frac{1}{10}{\lambda}^{2}$ |

Ratio of the triangle area to the wavelength squared (MoM order 1.5 basis function) | $A>\mathrm{0.21}{\lambda}^{2}$ | $A>\mathrm{0.52}{\lambda}^{2}$ |

Ratio of the triangle area to the wavelength squared (MoM order 2.5 basis function) | $A>0.62{\lambda}^{2}$ | $A>\mathrm{1.40}{\lambda}^{2}$ |

Ratio of the triangle area to the wavelength squared (MoM order 3.5 basis function) | $A>\mathrm{0.97}{\lambda}^{2}$ | $A>2.10{\lambda}^{2}$ |

Ratio of the triangle area to the wavelength squared for large element PO (if near fields present) | $A>2{\lambda}^{2}$ | $A>6{\lambda}^{2}$ |

Ratio of wire radius to the triangle edge length at a connection point | $r\ge 3.33l$ | $r\ge 5l$ |

Ratio of the cuboid^{1} edge
length to the wavelength |
$l>\frac{1}{4}\lambda $ | $l>\frac{1}{2}\lambda $ |

Ratio of the cuboid^{1} edge length to the skin depth |
$l>\frac{1}{5}\delta $ | $l>\frac{1}{3}\delta $ |

Ratio of the tetrahedral face area to the wavelength squared - VEP, FEM (first order) | $A>0.033{\lambda}^{2}$ | $A>0.108{\lambda}^{2}$ |

Ratio of the tetrahedral face area to the wavelength squared - FEM (second order) | $A>0.047{\lambda}^{2}$ | $A>0.433{\lambda}^{2}$ |

Ratio of the FEM boundary tetrahedral face area to the wavelength squared | $A>0.033{\lambda}^{2}$ | $A>0.108{\lambda}^{2}$ |

Ratio of the area of the triangle on a waveguide port to the smallest modal period squared | $A>\frac{1}{30}{T}^{2}$ | $A>\frac{1}{10}{T}^{2}$ |

Ratio of the wire radius to the voxel size | $r>0.49$ | $r>0.5$ |

Voxel aspect ratio | $AR\ge 15$ | $AR\ge 200$ |

^{1}Cuboids only supported in EDITFEKO.