Three-dimensional numerical computations are carried out to study heat transfer and pressure drop characteristics for laminar flow past circular tube banks in staggered and in-line arrangement confined within a narrow rectangular channel. A finite-volume based computational code has been developed for the computations. Vortex generators mounted near the upstream tube promote fluid mixing and enhance heat transfer in stagnant wake zone behind the tubes but offer extra pressure drop penalty. A splitter plate attached to the rear of the upstream circular tube acts as an extended heated surface and is expected to reduce the extra pressure drop due to vortex generators. The objective of this study is to find the configuration of tube arrangement in the presence of vortex generators and splitter plate that would be associated with enhanced heat transfer and reduced pressure drop. Heat transfer and pressure drop characteristics are presented for different lengths of the splitter plate in the absence and presence of vortex generators for both in-line and staggered arrangement of circular tubes.