Thermal efficiency enhancement of solar aircraft by utilizing unsteady hybrid nanofluid: a single-phase optimized entropy analysis by Jamshed, Wasim, Alanazi, Abdullah K., Mohamed Isa, Siti Suzilliana Putri, Banerjee, Ramashis, Eid, Mohamed R., Nisar, Kottakkaran Sooppy, Alshahrei, Hashem, Goodarzi, Marjan