antiplane elasticity | antiplane stress vector (*σ*_{13},*σ*_{23}) | displacement gradient ∇*w* | displacement *w* | shear moduli *μ*_{ij} |

thermal conductivity | heat flux *q*_{i} | temperature gradient −∇*T* | temperature *T* | thermal conductivity *k*_{ij} |

electrical conductivity | electrical current *J*_{i} | electric field *E*_{i}=∇*Φ* | electric potential *Φ* | electrical conductivity σ¯ij |

dielectrics | displacement field *D*_{i} | electric field *E*_{i}=∇*Φ* | electric potential *Φ* | electric permittivity *ϵ*_{ij} |

magnetism | magnetic induction *B*_{i} | magnetic field *H*_{i}=∇*Ψ* | magnetic potential *Ψ* | magnetic permeability *μ*_{ij} |

porous media | weighted velocity *ηv*_{i} | pressure gradient ∇*p* | pressure *p* | permeability *k*_{ij} |

diffusion | diffusion flux *j*_{i} | concentration gradient ∇*c* | concentration *c* | diffusivity *D*_{ij} |

acoustics | acceleration ∂**v**/∂*t* | pressure gradient −∇*p* | pressure *p* | inverse density tensor (*ρ*^{−1})_{ij} |