An efficient transient thermal model for electronics thermal management based on singular value decomposition

Electronics thermal management for high power applications is crucial. Modeling is an indispensable tool to help engineers design better electronics cooling systems. An efficient transient thermal model for electronics thermal management based on singular value decomposition (SVD) is proposed. The model generation process starts with computation fluid dynamics (CFD) results of an electronics model, from which SVD is used to calculate the approximate subspace which temperature solution belongs to. Then a state space model is created based on the CFD and SVD results to calculate the temperature field in the subspace. The state space model is very efficient and runs orders of magnitude faster because the dimension of the subspace is small. The state space model is then shown to provide very similar results as those from CFD under arbitrary transient power dissipation.