%0 Journal Article %T Heat Transfer, Pressure Drop, and Entropy Generation in a Solar Collector Using SiO2/Water Nanofluids: Effects of Nanoparticle Size and pH %A Mahian, Omid %A Kianifar, Ali %A Ahmet Z. Sahin %A Somchai Wongwises %J Journal of Heat Transfer %@ 0022-1481 %D 2015