Analyses of heat transfer in minichannels

This study is based on the evaluation of heat transfer in minichannels. A cooling process with Helium in minichannels was considered due to this evaluation. This concept consists of the optimisation and thermohydraulic simulations of a cooling finger (divertor) which was designed to move a great heat load of 15MW/m2 from fusion reactor. These experiments were done at the Forschungszentrum Karlsruhe (Germany). For different Helium temperatures, five different Helium mass flow rates were measured ( for 4000C only four was possible). The datas of the thermocouples which were positioned in the test section, were recorded and compared with the simulation results obtained by using different turbulance models of STARCD to make obvious if these models are reliable. Furtheremore, a simple geometric temperature region model was also executed as a simple alternative of these turbulance models to check the reliability.