“…(1) (Hojjat et al, 2011). Thus, the NP existing in the deionized water containing OAK + , which affected the flowing behavior of the nanofluids, was the main cause of the decrease in viscosity (Anoop et al, 2009;Lo et al, 2007). The potassium salt which produces an effect properly surfactant was helpful in balancing the physical properties of the base liquid.…”