DescriptionA detailed experimental study is undertaken to investigate the flow structure and heat transfer in an impinging jet Chemical Vapor Deposition (CVD) reactor at atmospheric pressure. It is critical to develop models that predict flow patterns in such a reactor to achieve uniform deposition across the substrate. Free convection can negatively affect the gas flow as cold inlet gas impinges on the heated substrate, leading to vortices and disturbances in the normal flow path. This experimental research will be used to understand the buoyancy-induced and momentum-driven flow structure encountered in an impinging jet CVD reactor. Investigations are conducted for various operational parameters such as substrate temperature and inlet velocity. In addition, different reactor geometries with varying inlet length and height between the substrate and inlet are included in the study. Experimental results obtained from the study provide information on the temperature distribution, heat transfer rates, and flow field. Such results validate the operation of the reactor at atmospheric pressure and provide valuable insight into future design of impinging jet CVD reactors.