In this research, a two-way coupling of discrete phase model is developed in order to track\nthe discrete nature of aluminum oxide particles in an obstructed duct with two side-by-side obstacles.\nFinite volume method and trajectory analysis are simultaneously utilized to solve the equations\nfor liquid and solid phases, respectively. The interactions between two phases are fully taken into\naccount in the simulation by considering the Brownian, drag, gravity, and thermophoresis forces.\nThe effects of space ratios between two obstacles and particle diameters on different parameters\ncontaining concentration and deposition of particles and Nusselt number are studied for the constant\nvalues of Reynolds number (Re = 100) and volume fractions of nanoparticles (�¦ = 0.01). The obtained\nresults indicate that the particles with smaller diameter (dp = 30 nm) are not affected by the flow\nstreamline and they diffuse through the streamlines. Moreover, the particle deposition enhances as\nthe value of space ratio increases. A comparison between the experimental and numerical results\nis also provided with the existing literature as a limiting case of the reported problem and found in\ngood agreement
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