The multi-physics problem of quench propagation in Nb3Sn cables has been addressed under adiabatic conditions by means of a set of analytical formulae and several Finite Element Models (FEM) with different level of complexity in ANSYS Mechanical APDL, COMSOL Multiphysics and MATLAB. These models are aimed at describing the conductor behaviour in terms of Hot Spot Temperature and Quench Propagation Velocity observed during the training of racetrack coils at SM18. The models have been validated with experimental datasets and the different assumptions discussed.