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Appl. Sci. 2017, 7(4), 431; doi:10.3390/app7040431

Convective Heat Transfer and Particle Motion in an Obstructed Duct with Two Side by Side Obstacles by Means of DPM Model

1
Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran
2
Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Iran
3
Department of Mathematics & Statistics, FBAS, IIUI, Islamabad 44000, Pakistan
All authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Yulong Ding and Yuyuan Zhao
Received: 11 January 2017 / Revised: 14 March 2017 / Accepted: 19 April 2017 / Published: 24 April 2017
(This article belongs to the Special Issue Recent Developments of Nanofluids)
View Full-Text   |   Download PDF [4859 KB, uploaded 24 April 2017]   |  

Abstract

In this research, a two-way coupling of discrete phase model is developed in order to track the discrete nature of aluminum oxide particles in an obstructed duct with two side-by-side obstacles. Finite volume method and trajectory analysis are simultaneously utilized to solve the equations for liquid and solid phases, respectively. The interactions between two phases are fully taken into account in the simulation by considering the Brownian, drag, gravity, and thermophoresis forces. The effects of space ratios between two obstacles and particle diameters on different parameters containing concentration and deposition of particles and Nusselt number are studied for the constant values of Reynolds number (Re = 100) and volume fractions of nanoparticles (Φ = 0.01). The obtained results indicate that the particles with smaller diameter (dp = 30 nm) are not affected by the flow streamline and they diffuse through the streamlines. Moreover, the particle deposition enhances as the value of space ratio increases. A comparison between the experimental and numerical results is also provided with the existing literature as a limiting case of the reported problem and found in good agreement. View Full-Text
Keywords: concentration; deposition; two-way coupling; side-by-side obstacles; discrete phase model (DPM) concentration; deposition; two-way coupling; side-by-side obstacles; discrete phase model (DPM)
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MDPI and ACS Style

Rashidi, S.; Esfahani, J.A.; Ellahi, R. Convective Heat Transfer and Particle Motion in an Obstructed Duct with Two Side by Side Obstacles by Means of DPM Model. Appl. Sci. 2017, 7, 431.

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