Volume 20, Issue 8 (August 2020)
Modares Mechanical Engineering 2020, 20(8): 2029-2043 |
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Hosseinnejad F, Kouhikamali R. Experimental and Numerical Investigation of Droplet Flow in Plastic and Metallic Wire Mesh Demisters. Modares Mechanical Engineering 2020; 20 (8) :2029-2043
URL: http://mme.modares.ac.ir/article-15-37076-en.html
URL: http://mme.modares.ac.ir/article-15-37076-en.html
Experimental and Numerical Investigation of Droplet Flow in Plastic and Metallic Wire Mesh Demisters
1- Energy Conversion Department, Mechanical Engineering Faculty, University of Guilan, Rasht, Iran
2- Energy Conversion Department, Mechanical Engineering Faculty, University of Guilan, Rasht, Iran ,kouhikamali@guilan.ac.ir
2- Energy Conversion Department, Mechanical Engineering Faculty, University of Guilan, Rasht, Iran ,
Abstract: (3170 Views)
In the current study, experimental and numerical methods have been used to investigate the pressure drop and the separation efficiency of wire mesh demisters in an air-water system. Using the designed and manufactured experimental model, various parameters such as air velocity, packing density, and wire diameter in plastic and metallic demisters have been studied. Numerical simulation was carried out in two-dimensional and transient form using K-epsilon (k-ε) turbulence model in commercial software ANSYS Fluent and validated against experimental results. The Eulerian-Lagrangian discrete phase model was also used to simulate the water droplet trajectory at diameters of 0.2 and 0.05mm. The numerical simulation results are sufficiently accurate compared to the experimental data. The numerical solver predicts separation efficiency with error of about 20% and pressure drop with error of less than 20% compared to experimental data. The numerical simulation results show that increasing the diameter of water droplets at higher air velocities and higher packing densities is more effective and increases the separation efficiency up to 36%. Also, increasing the packing density increases the separation efficiency for droplets with a diameter of 0.2mm and decreases the separation efficiency for droplets with a diameter of 0.05mm. The results show that the separation efficiency of plastic demister is more than the separation efficiency of metallic demister and in lower packing densities, the use of plastic demister is advisable.
Keywords: Wire Mesh Demister, Packing Density, Wire Diameter, Diameter of Water Droplets, Separation Efficiency, Pressure Drop
Article Type: Original Research |
Subject:
Computational Fluid Dynamic (CFD)
Received: 2019/10/5 | Accepted: 2020/05/15 | Published: 2020/08/15
Received: 2019/10/5 | Accepted: 2020/05/15 | Published: 2020/08/15
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