Computational fluid dynamics (CFD) analysis of mixing in styrene polymerization

Residence Time ◽

Cfd Simulation ◽

Monomer Conversion ◽

High Viscosity ◽

Cfd Model ◽

Input Output ◽

Styrene Polymerization ◽

A styrene polymerization in a lab-scale CSTR equipped with a pitched blade turbine impeller was simulated using the computational fluid dynamics (CFD) approach. The impeller motion was integrated in the geometry using the multiple reference frame (MRF) technique. The presence of non-linear source term and the highly coupled nature of transport equations of the polymerization, made the convergence difficult to achieve. The effects of the impeller speed, the input-output locations and the residence time on the polymerization in the CSTR were investigated. The CFD simulation shows that good mixing remained limited to the impeller region. Regions far from the impeller remained unmixed due to high viscosity of the polymer mass. The path lines of the particles, released at the inlet, were also generated to analyze the reaction progress as the chemicals travel throughout the reactor. The monomer conversion computed using the CFD model was compared to data reported in the literature. Conversion predicted using the CFD model is in good agreement with that obtained from the CSTR model at low residence time. However, the CFD predicted coversions were higher than those calculated from the CSTR model, at high residence time. It was found that the input-output locations had significant effect on the conversion and the homogeneity in the CSTR.

Verification and Validation of a Detonation Computational Fluid Dynamics Model

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.366.40 ◽

2016 ◽

Vol 366 ◽

pp. 40-46

Author(s):

Rui Li Wang ◽

Xiao Liang ◽

Wen Zhou Lin ◽

Xue Zhe Liu ◽

Yun Long Yu

Keyword(s):

Fluid Dynamics ◽

Cfd Simulation ◽

Verification And Validation ◽

Cfd Model ◽

Dynamics Model ◽

Computational Fluid Dynamics Model ◽

Primary Means ◽

Computational Fluid Dynamics Cfd ◽

2D Space

Verification and validation (V&V) are the primary means to assess the accuracy and reliability in computational fluid dynamics (CFD) simulation. V&V of the multi-medium detonation CFD model is conducted by using our independently-developed software --- Lagrangian adaptive hydrodynamics code in the 2D space (LAD2D) as well as a large number of benchmark testing models. Specifically, the verification of computational model is based on the basic theory of the computational scheme and mathematical physics equations, and validation of the physical model is accomplished by comparing the numerical solution with the experimental data. Finally, some suggestions are given about V&V of the detonation CFD model.

Computational Fluid Dynamics (CFD) Simulation of Liquid-Liquid Mixing in Mixer Settler

Archives of Metallurgy and Materials ◽

10.2478/v10172-012-0006-7 ◽

2012 ◽

Vol 57 (1) ◽

pp. 173-178 ◽

Cited By ~ 5

Author(s):

M. Shabani ◽

A. Mazahery

Keyword(s):

Fluid Dynamics ◽

Process Simulation ◽

Chemical Process ◽

Cfd Simulation ◽

Complex Geometry ◽

Physical Parameters ◽

Cfd Model ◽

Liquid Mixing ◽

Computational Fluid Dynamics (CFD) Simulation of Liquid-Liquid Mixing in Mixer Settler Mixer-settlers are widely used inmetallurgical, mineral and chemical process. One of the greatest challenges in the area of hydrometallurgy process simulation is agitation made by impeller inside mixer-settler which yet presents one of the most common operations. Computational fluid dynamics (CFD) model has been developed to predict the effect of different physical parameters including temperature and density on the mixing characteristics of the system. It is noted that non-isotropic nature of flow in a mixer-settler, the complex geometry of rotating impellers and the large disparity in geometric scales present are some of the factors which contribute to the simulation difficulty. The experimental data for different velocity outlet was also used in order to validate the model.

Computational Fluid Dynamics Simulation of Steel Bars Cooling by Free Convection and Thermal Radiation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.798.170 ◽

2015 ◽

Vol 798 ◽

pp. 170-174

Author(s):

Paulo Henrique Terenzi Seixas ◽

Paul Campos Santana Silva ◽

Rudolf Huebner

Keyword(s):

Fluid Dynamics ◽

Thermal Radiation ◽

Cfd Simulation ◽

Dynamics Simulation ◽

Cfd Model ◽

Computational Fluid Dynamics Simulation ◽

Slow Cooling ◽

Steel Bars ◽

In this article, the pilling process of hot steel bars is analyzed. During the loading three bars are placed over a wood surface, after those other three are placed over the previous for two times with 5 minutes intervals between them.They are all subject to a slow cooling by thermal radiation and free convection.A Computational Fluid Dynamics (CFD) model to predict the temperature profile of them is developed. Comparison between the CFD simulation results and experimental data yielded an average difference in the bars temperature between -0.3oC and 3.5oC.

A Two-Dimensional CFD Simulation for Different Spacers of Spiral Wound Moudles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.557-559.2249 ◽

2012 ◽

Vol 557-559 ◽

pp. 2249-2252 ◽

Cited By ~ 1

Author(s):

Song Lin Xu ◽

Wen Qiang Mi

Keyword(s):

Fluid Dynamics ◽

Fluid Flow ◽

Cfd Simulation ◽

Two Dimensional ◽

Cfd Model ◽

Visual Method ◽

Unsteady Fluid Flow ◽

Computational Fluid Dynamics Cfd ◽

Unsteady Fluid

A computational fluid dynamics (CFD) model was used to simulate unsteady fluid flow in a two-dimensional channel. The flow was computed for several different geometries and velocity. Calculations show different flow patterns of the cavity spacer, the submerged spacer and the zigzag spacer. Applications of two-dimensional CFD simulation give a visual method to determine the advantages of each spacer type.

CFD Simulation of Hydraulics of Dividing Wall Sieve Trays

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.476-478.1345 ◽

2012 ◽

Vol 476-478 ◽

pp. 1345-1350

Author(s):

Yan Wang ◽

Song Du ◽

Huai Gong Zhu ◽

He Xu Ma ◽

Shao Qing Zuo

Keyword(s):

Fluid Dynamics ◽

Cfd Simulation ◽

The Other ◽

Phase Flow ◽

Cfd Model ◽

Two Phase ◽

Sieve Tray ◽

Commercial Scale ◽

A 3D two-phase flow computational fluid dynamics (CFD) model containing gas mal-distribution is developed in the Eulerian framework to predict the hydraulics of a dividing wall sieve tray. Variable and position dependent gas superficial velocity is used in the calculation. Using water-air system, simulations of flow patterns and hydraulics of a commercial- scale 1.2m diameter sieve tray are carried out using this model to testify its precision. Then, the same simulations of a dividing wall sieve tray with equal diameter are carried out. The results show that there are two backflow regions on a dividing wall tray, one is in the segmental area, and the other is in the region nearby junction of dividing wall and outlet weir. In the segmental area of trays with equal diameter, the area of backflow region of dividing wall trays is basically equal to that of conventional trays.

Computational fluid dynamics (CFD) simulation of flow in the rotary drum for pyrite bio-preoxidization

Chemical Engineering and Processing - Process Intensification ◽

10.1016/j.cep.2007.03.011 ◽

2008 ◽

Vol 47 (5) ◽

pp. 971-978 ◽

Cited By ~ 5

Author(s):

T. Liu ◽

X. Qi ◽

G. Su ◽

J. Jin ◽

W. Cong

Keyword(s):

Fluid Dynamics ◽

Cfd Simulation ◽

Computational Fluid Dynamics Cfd ◽

Rotary Drum

A Computational Fluid Dynamics (CFD) model to simulate the inactivation of Geobacillus stearothermophilus spores in different moist heat sterilization environments

Physics in Medicine ◽

10.1016/j.phmed.2021.100039 ◽

2021 ◽

pp. 100039

Author(s):

Manuel Feurhuber ◽

Ralf Neuschwander ◽

Thomas Taupitz ◽

Valentin Schwarz ◽

Carsten Frank ◽

...

Keyword(s):

Fluid Dynamics ◽

Geobacillus Stearothermophilus ◽

Cfd Model ◽

Moist Heat ◽

Computational Fluid Dynamics (CFD) Simulation on Mixing in T-Shaped Micromixer

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/932/1/012006 ◽

2020 ◽

Vol 932 ◽

pp. 012006

Author(s):

S N A Ahmad Termizi ◽

C Y Khor ◽

M A M Nawi ◽

Nurlela Ahmad ◽

Muhammad Ikman Ishak ◽

...

Keyword(s):

Fluid Dynamics ◽

Cfd Simulation ◽

A Study on the Performance of Stratified Air Conditioning Design in Assembly Halls – A Case Study at the Dazhi Cultural Center in Taiwan

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.368-370.599 ◽

2013 ◽

Vol 368-370 ◽

pp. 599-602 ◽

Cited By ~ 1

Author(s):

Ian Hung ◽

Hsien Te Lin ◽

Yu Chung Wang

Keyword(s):

Fluid Dynamics ◽

Indoor Air ◽

Air Conditioning ◽

Cfd Simulation ◽

Indoor Temperature ◽

Cultural Center ◽

This study focuses on the performance of air conditioning design at the Dazhi Cultural Center and uses a computational fluid dynamics (CFD) simulation to discuss the differences in wind velocity and ambient indoor temperature between all-zone air conditioning design and stratified air conditioning design. The results have strong implications for air conditioning design and can improve the indoor air quality of assembly halls.