A CFD Study of Turbulent Convective Heat Transfer Enhancement in Circular Pipeflow

摘要: Addition of milli or micro sized particles to the h eat transfer fluid is one many techniques employ ed for improving heat rate. Though this looks simple, method has practical problems such as high pressure loss, clog ging and erosion material construction. These ca n be overcome by using nanofluids, which a dispersion nanosize d in base fluid. Nanoparticles increase thermal con ductivity manifold turn increases hea t also viscosity ba sefluid resulting higher drop nanofluid compared So it imperative that Reynolds number (Re) volume fraction have optimum better hydr aulic effectiveness. In work, enh ancement aluminium oxide low nanofluids turbulent pipe flow with constant wal l temperature been studied computational dynamic modeling adopting single phase approach. Nanofluid, up till 1% found an effective enhancement technique. The Nusselt (Nu) friction factor predictions fractions (i.e. 0.02 %, 0.1 0.5%) agree very well experimental values Sun dar Sharma (2010). While, fra ction 1%, 4% 6%) are reasonable greement both numerical results available i literature. computationally inexpensive app roach can used prediction new nanofluids. Keywords—Heat intensification, nanofluid, CFD, fric tion