Numerical Investigation of Nanofluid Flow over a Backward Facing Step

Nanofluid flow over a backward facing step was investigated numerically at low Reynolds number and the heat transfer analyzed reported. Al2O3–H2O nanofluids of different volume fractions (φ = 1–5%) were used as material with uniform flux (UHF) 5000 W/m2 bottom wall for 200–600. The two geometries expansion ratios, 1.9432 3.5. SIMPLE algorithm in finite solver to solve Naiver–Stokes equation. Temperature difference inlet boundaries, coefficient, Nusselt number, coefficient skin friction, temperature contours results show that when are used, increased all both ratios. φ 5% higher by 9.14% 9.68% than pure water ER 3.5 Re. 500. At 5%, outlet duct decreased 10 K 5 compared Coefficient friction