Numerical Simulation of Turbulent Nano-fluid Flow in a Circular Elbow

Force convection heat transfer of turbulent nano fluid flow in 90 and 60 degree elbow is simulated by using fluent. single phase model has been implemented to study such a flow field and standard 𝑘-𝜀model is employed. the considered nanofluids are mixtures of al2o3 nanoparticles and water as the base fluid. simulation effect of reynolds number and nano concentration on nusselt number and friction coefficient have been presented and discussed. the computed results are compared with previously published data for a base fluid (0% nano concentration) and good agreement between the results is observed. it is seen that by increasing reynolds number and nano concentration, heat transfer increase and friction coefficient decrease. heat transfer in 90 and 60 degree elbow is compared and result shows by increasing the angle, heat transfer will decrease.