Parameter optimization for the oxidative coupling of methane in a fixed bed reactor by combination of response surface methodology and computational fluid dynamics

Abstract In 2006, Dixon et al. published the comprehensive review article entitled “Packed tubular reactor modeling and catalyst design using computational fluid dynamics.” More than one decade later, many researchers have contributed to novel insights, as well as a deeper understanding of the topic. Likewise, complexity has grown and new issues have arisen, for example, by coupling microkinetics with computational fluid dynamics (CFD). In this review article, the latest advances are summarized in the field of modeling fixed-bed reactors with particle-resolved CFD, i.e. a geometric resolution of every pellet in the bed. The current challenges of the detailed modeling are described, i.e. packing generation, meshing, and solving with an emphasis on coupling microkinetics with CFD. Applications of this detailed approach are discussed, i.e. fluid dynamics and pressure drop, dispersion, heat and mass transfer, as well as heterogeneous catalytic systems. Finally, conclusions and future prospects are presented.

Download Full-text

Optimal design of a pipe isolation plugging tool using a computational fluid dynamics simulation with response surface methodology and a modified genetic algorithm

Advances in Mechanical Engineering ◽

10.1177/1687814017715563 ◽

2017 ◽

Vol 9 (10) ◽

pp. 168781401771556 ◽

Cited By ~ 1

Author(s):

Hong Zhao ◽

Hao-Ran Hu

Keyword(s):

Fluid Dynamics ◽

Genetic Algorithm ◽

Computational Fluid Dynamics ◽

Response Surface Methodology ◽

Optimal Design ◽

Response Surface ◽

Dynamics Simulation ◽

Computational Fluid Dynamics Simulation ◽

Modified Genetic Algorithm

Download Full-text

Study of Gas Shortcut Flow Rate in Cyclone with Different Inlet Section Angles Using Response Surface Methodology

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1827 ◽

2009 ◽

Vol 7 (1) ◽

Author(s):

Fuping Qian ◽

Xingwei Huang ◽

Mingyao Zhang

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Response Surface Methodology ◽

Response Surface ◽

Flow Rate ◽

Numerical Solutions ◽

Inlet Section ◽

Statistical Software ◽

Vortex Finder ◽

Computational Fluid Dynamics Cfd

Numerical simulations of cyclones with various vortex finder dimensions and inlet section angles were performed to study the gas shortcut flow rate. The numerical solutions were carried out using commercial computational fluid dynamics (CFD) code Fluent 6.1. A prediction model of the gas shortcut flow rate was obtained based on response surface methodology by means of the statistical software program (Minitab V14). The results show that the length of the vortex finder insertion, the vortex finder diameter and the inlet section angle play an important role in influencing the gas shortcut flow rate. The gas shortcut flow rate decreases when increasing the inlet section angle, and increases when increasing the vortex finder diameter and decreasing the length of the vortex finder insertion. Compared with the effect of the length of the vortex finder insertion on the shortcut flow rate, the effect of the vortex finder diameter on the gas shortcut flow rate seems more pronounced. The effect of the vortex finder dimension on the gas shortcut flow rate is changed with the different inlet section angles, i.e., the effects of the vortex finder dimension of the conventional cyclone (the inlet section angle is 0º) on the gas shortcut flow rate is stronger than the cyclone with 30º and 45º inlet section angles.

Download Full-text

Computational fluid dynamics analysis of a modified Savonius rotor and optimization using response surface methodology

Wind Engineering ◽

10.1177/0309524x17709732 ◽

2017 ◽

Vol 41 (5) ◽

pp. 285-296 ◽

Cited By ~ 2

Author(s):

Haris Moazam Sheikh ◽

Zeeshan Shabbir ◽

Hassan Ahmed ◽

Muhammad Hamza Waseem ◽

Muhammad Zubair Sheikh

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Response Surface Methodology ◽

Response Surface ◽

Design Of Experiment ◽

Coefficient Of Performance ◽

Speed Ratio ◽

Ansys Fluent ◽

Computational Fluid Dynamics Analysis ◽

Parametric Effects

This article aims to present a two-dimensional parametric analysis of a modified Savonius wind turbine using computational fluid dynamics. The effects of three independent parameters of the rotor, namely, shape factor, overlap ratio, and tip speed ratio on turbine performance were studied and then optimized for maximum coefficient of performance using response surface methodology. The rotor performance was analyzed over specific domains of the parameters under study, and three-variable Box-Behnken design was used for design of experiment. The specific parametric combinations as per design of experiment were simulated using ANSYS Fluent®, and the response variable, coefficient of performance (Cp), was calculated. The sliding mesh model was utilized, and the flow was simulated using Shear Stress Transport (SST) k − ω model. The model was validated using past experimental results and found to predict parametric effects accurately. Minitab® and ReliaSoft DOE++® were used to develop regression equation and find the optimum combination of parameters for coefficient of performance over the specified parametric domains using response surface methodology.

Download Full-text