RT Journal Article ID 49a33eb219c108e2 A1 Shahriari, Alireza A1 Javaran, Ebrahim Jahanshahi A1 Rahnama, Mohammad T1 SIMULATION OF NATURAL CONVECTION OF AN Al2O3/WATER NANOFLUID IN A COMPLEX WAVY-WALL CAVITY USING THE LATTICE BOLTZMANN METHOD JF Heat Transfer Research JO HTR YR 2019 FD 2019-09-05 VO 50 IS 15 SP 1513 OP 1530 K1 nanofluid K1 lattice Boltzmann method K1 natural convection K1 Nusselt number K1 cavity AB In this paper, two-dimensional natural convection of an Al2O3/water nanofluid is presented using the lattice Boltz-mann method. Natural convection occurs in a cavity with two complex-wavy vertical walls, as hot and cold surfaces while the top and bottom ones are insulated. The effect of pertinent parameters such as the volume fraction of nanoparticles, Rayleigh numbers, and complex-wavy-wall geometry parameters on flow and heat transfer fields are investigated in detail. Results show an increase in the Nusselt number with volume fraction for Rayleigh numbers in the range 103 < Re < 106. Moreover, the effect of wavy-surface geometry parameters such as the wavelength and amplitude ratio, on heat transfer is studied, and an optimum value for heat transfer rate is obtained. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,62eeaa282c1df1b6,49a33eb219c108e2.html