Physical optimization of a wavy porous cavity filled by nanofluids in the presence of solar radiations using the Box-Behnken design (BBD)A. Ghorbanian, M. Tahari and M. HatamiEur. Phys. J. Plus, 132 6 (2017) 278DOI: https://doi.org/10.1140/epjp/i2017-11583-8