Transfer function method of multi-dimension heat transfer and instability analysis

Presents the transfer function method based on multi-dimension state model. Simulates the heat transfer through the corner of the wall. Analyses the numerical instability of the method. The results show that the root of the characteristic equation may be out of the range and simulation results have not convergence when its application to fine mesh of envelope spatial discretization, short time step or high thermal inertia envelope, which limits its application to a certain extent.