Abstract
Many researchers are interested in nanofluids as an alternative to traditional fluids for increasing heat transmission. Nanofluids are made by dispersing nanoparticles with diameters of around 100 nm in a base fluid. Hybrid and ternary hybrid nanofluids are a novel type of nanofluid that improves the qualities of traditional nanofluids. In this chapter, comprehensive formulas on thermophysical properties (density, viscosity, specific heat capacity, thermal expansion coefficient, thermal conductivity, shape factor, and electrical conductivity) of nanofluids, hybrid nanofluids, and ternary hybrid nanofluids are presented. Considering the wide applications of nanofluids, at the end of the chapter, the application of ternary hybrid nanofluid has been comprehensively investigated.