Retraction Note: Thermal cooling efficacy of a solar water pump using Oldroyd-B (aluminum alloy-titanium alloy/engine oil) hybrid nanofluid by applying new version for the model of Buongiorno - Faisal Shahzad; Wasim Jamshed; Mohamed R. Eid; Rabia Safdar; Siti Suzilliana Putri Mohamed Isa; Sayed M. El Din; Nor Ain Azeany Mohd Nasir; Amjad Iqbal (Scientific Reports)