μ _ ⊥ = μ _ r 2 − κ _ r 2 μ _ r MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiqbeY7aTzaaDaWaaSbaaSqaaiabgwQiEbqabaGccqGH9aqpdaWcaaqaamaamaaabaGaeqiVd0gaamaaDaaaleaaciGGYbaajeaybaGaaGOmaaaakiabgkHiTmaamaaabaGaeqOUdSgaamaaDaaaleaaciGGYbaajeaybaGaaGOmaaaaaOqaamaamaaabaGaeqiVd0gaamaaBaaaleaacaqGYbaabeaaaaaaaa@462B@
where μr and κr are components of Polder's tensor permeability
où μr et κr sont les composantes de la perméabilité tensorielle de Polder