Mohammad Izadi - Department of Mechanical Engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran,
Saeed Dinarvand - Department of Mechanical Engineering, Islamic Azad University, Central Tehran Branch, Tehran, Iran,

Nanofluids refer to the dilute suspensions of ultrafine particles in base fluids. Such liquids have preferable thermophysical properties rather than pure working fluids. Hybrid nanofluid as an extension of nanofluid is obtained by dispersing composite nano-powder or two different nanoparticles in the base fluid that can be used in all applications where ever single nanofluids are used. Here, a kind of hybrid nanofluid including hematite (Fe2O3 ) and copper oxide (CuO) nano-size particles with water as base fluid is analytically modeled to develop the Falkner-Skan problem. Analytic modeling of hybrid nanofluid is presented and using suitable similarity variables, the governing PDEs are transformed into nonlinear ODEs in the dimensionless stream function, which is solved numerically applying the function bvp4c from MATLAB. Our results support thatthe developed model can be used with great certainty to study the flow and heat transfer of hybrid nanofluids. It is found that dual solutions exist for a porous stretching/shrinking wedge.

Hybrid nanofluid; Analytic model; Porous wedge; Stretching/Shrinking wedge; Dual solutions