The research aims to investigate the heat transfer characteristics of a novel triangular cross section multiple jet impingement system. Computational fluid dynamics was used to analyse the curved plate at a constant temperature of Al2O3–Cu/water nanofluids in different volume fractions amounts which are given in %, 0.1%, 0.33%, 0.75%, and 1.0%. The primary aim was to explore the effects of jet angle (β), jet Reynolds number (Re), jet height ( \({E}_{\text{j}}\) ), and nanofluid volume fraction ( \({\varphi }_{\text{hnf}}\) ) on heat transfer and pressure drop of suggested system. The range of the jet Reynolds number in the current study was between 8,000 and 24,000, and multiple jet angles of 15°, 30°, 45°, 60°, and 90°, as well as three multiple jet heights of 0.2 H, 0.4 H, 0.6 H, were used. There is a high enhancement found in Nusselt’s number with high Reynolds numbers, i.e. 63.5%, and high nanofluid volume fractions, respectively, while there was a balanced increase found in pressure drop. It is concluded when basing which are the main jet angles to gain a high Nusselt number is 30° with a difference of 42.18%. Moreover, Nusselt number increases as the jet height decreases, with low pressure drop. A correlation equation was developed based on the specified jet and the Reynolds number range.
