Modelling diffusion based processes using TLM

Describes the operation of a transmission line matrix (TLM) based model of a diffusion problem. Extension to the basis treatment are reviewed and applications referred to. In TLM both space and time are discretised; the spacial region of interest is divided elemental volumes, and the modelling period is divided into iteration timesteps. TLM is, therefore, primarily a technique of transient analysis. In the diffusion application, TLM not only offers conceptual advantages to many people but can be significantly more efficient computationally than more traditional techniques, since numerical routines based on TLM are explicit, one- step and unconditionally stable