Hydrodynamic analysis of the nanofluids flow in a microchannel with hydrophobic and superhydrophobic surfaces

摘要: Abstract We studied the hydrodynamic features of nanofluids flowing inside a straight microchannel with hydrophilic, hydrophobic, and superhydrophobic walls by finite volume method. The single-phase method is applied for prediction properties water/Al2O3 nanofluids. nanofluid based on deionized water particle concentrations 0.1%, 0.5%, 1.0%. Interpretations velocity profiles, Poiseuille number, pumping power, friction coefficients are presented different hydrophobicities walls. considered various flows Reynolds numbers in range 50 to 400 constant heat flux 10,000 W/m2. obtained results depict that implementation leads increase power which greater higher fractions. number shows effects entry region decrease when because reduction slopes at wall. For hydrophilic walls, increases 74%. However, flow cause 47% compared usual Using wall resolves disadvantages pressure drop rises significantly.