Numerical investigation of effect of different parameter on heat transfer for a crossflow heat exchanger by using nanofluids

The heat loads on electronic systems of an unmanned air vehicle are a significant problem. So enhancing transfer is critical key to solve these thermal problems. This study focused increasing rate in crossflow exchanger by using nanofluids numerically. Effects different Reynolds number hot fluid (Re= 6000, 8000, 10000, 12000), inlet velocity (Vair,inlet=30, 45, 60, 90 m/s) cooling fluid, temperature at altitude (Tair,inlet=15, 10, 4, -17?) and types (Cu-H2O, CuO-H2O, TiO2-H2O, H2O) were studied Realizable k-? turbulence model ANSYS FLUENT computational dynamics code was used for numerical analysis. It obtained that from Re=6000 12000 causes increase 44.65% average Nusselt Number. Increasing 30 m/s 6.96% number. or decreasing attitude does not cause any change Using Cu-H2O nanofluid, which shows the best performance, 6.63% according H2O. Numerical results also compared with experimental literature. can represent good level.