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static-mixers
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Comparative analysis of different static mixers performance by CFD technique: An innovative mixer
, Article Chinese Journal of Chemical Engineering ; Volume 28, Issue 3 , 2020 , Pages 672-684 ; Hosseini, S. H ; Rashtchian, D ; Olazar, M ; Sharif University of Technology
Chemical Industry Press
2020
Abstract
The flow and mixing behavior of two miscible liquids has been studied in an innovative static mixer by using CFD, with Reynolds numbers ranging from 20 to 160. The performance of the new mixer is compared with those of Kenics, SMX, and Komax static mixers. The pressure drop ratio (Z-factor), coefficient of variation (CoV), and extensional efficiency (α) features have been used to evaluate power consumption, distributive mixing, and dispersive mixing performances, respectively, in all mixers. The model is firstly validated based on experimental data measured for the pressure drop ratio and the coefficient of variation. CFD results are consistent with measured data and those obtained by...
Numerical Simulation of a Novel Static Mixer by CFD
, M.Sc. Thesis Sharif University of Technology ; Rashtchian, Davood (Supervisor) ; Hosseini, Hossein (Supervisor)
Abstract
The main objective of this study is a numerical simulation of flow and mixing behavior of two miscible liquids in a new static mixer over the Reynolds number in the range of 20-160. The performance of the proposed static mixer has been compared with the well-known three different static mixers namely, Kenics, SMX, and Komax. Pressure drop ratio (Z-factor), a coefficient of variation (CoV) and extensional efficiency (α) characteristics were, respectively, used to evaluate power consumption, distributive mixing and dispersive mixing performances in all static mixers. Since there are no experimental data for examined mixers, firstly, the CFD model was validated with measured data of the...
Experimental and Simulation Study of The Mixing Process of Sponge Iron Particles and Binder
, M.Sc. Thesis Sharif University of Technology ; Molaei Dehkordi, Asghar (Supervisor)
Abstract
Regarding the popularity and progression of iron production with direct reduced method in the world, one of the most common methods of quality maintaining of DRI (Direct Reduced Iron) in transporting and make it globally accessible and used, is to convert it to the briquette form. To increase the quality of briquettes and reduce the use of binder, should make sure that the binder and DRI particles with different sizes are totally mixed together and to prevent segregation of particles with different sizes as much as possible while the binder is spread among the whole particles. Therefore, using the static mixer can be the first choice due to its low production, operational, and maintenance...
CFD modeling of immiscible liquids turbulent dispersion in Kenics static mixers: Focusing on droplet behavior
, Article Chinese Journal of Chemical Engineering ; Volume 28, Issue 2 , 2020 , Pages 348-361 ; Hosseini, S. H ; Rashtchian, D ; Ahmadi, G ; Sharif University of Technology
Chemical Industry Press
2020
Abstract
The present study is concerned with the computational fluid dynamics (CFD) simulation of turbulent dispersion of immiscible liquids, namely, water–silicone oil and water–benzene through Kenics static mixers using the Eulerian–Eulerian and Eulerian–Lagrangian approaches of the ANSYS Fluent 16.0 software. To study the droplet size distribution (DSD), the Eulerian formulation incorporating a population balance model (PBM) was employed. For the Eulerian–Lagrangian approach, a discrete phase model (DPM) in conjunction with the Eulerian approach for continuous phase simulation was used to predict the residence time distribution (RTD) of droplets. In both approaches, a shear stress transport (SST)...