There is a need to understand fluid flow and heat transfer characteristics in the existing heat exchange system to meet the cooling demands of the industry. An algorithm based on Streamline Upwind Petrov-Galerkin (SUPG) Finite Element Method (FEM) is implemented to simulate the fluid flow and heat transfer in complex geometries of practical situations. In this talk some of the novel techniques to enhance the heat transfer in electronic cooling, fuel cell, nuclear and heat exchanger applications simulated using an in-house finite element solver are discussed.