Amirkabir University of Technology AUT Journal of Mechanical Engineering 2588-2937 1 1 2017 06 01 Numerical Investigation of Nano Particles Dispersion and Deposition in Fully Developed Laminar Pipe Flows 13 20 762 10.22060/mej.2016.762 EN P. Talebizadeh Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran H. Rahimzadeh Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran G. Ahmadi Department of Mechanical and Aeronautical Engineering, Clarkson University, New York, USA R. Brown Biofuel Engine Research, Queensland University of Technology, Brisbane, Australia K. Inthavong School of Aerospace, Mechanical and Manufacturing, Engineering, RMIT University, Melbourne, Australia Journal Article 2015 11 09 The aim of this paper is to study the deposition and dispersion of nano particles in fully developed laminar pipe flows numerically. To simulate particle transport and to locate the position of particles, the Eulerian - Lagrangian method is used under the conditions of one-way coupling. Due to  studied range of particle diameters from 5 nm to 100 nm, the main effective force for particle deposition is the Brownian diffusion force. After studying the mesh independency and validating results, time history analysis of particle transport is also performed by injecting the particles from the inlet surface and tracking them at each moment. Furthermore, the effective parameters, i.e. particle diameter, pipe length and diameter, temperature and particle density are studied comprehensively. The results of time history analysis of particle transport show that nano particles with less diameters are more deposited in less time. Furthermore, maximum number of escaped particles from the pipe occurred at 0.035 s after injecting the particles for all studied particle diameters due to the studied flow rate and length of the pipe. The output of this study can provide a guideline for evaluating nano particle transport and deposition in fully developed laminar pipe flows. https://ajme.aut.ac.ir/article_762_fc5307a659c4fee0e725733fb3738685.pdf