The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Bin Jiang - One of the best experts on this subject based on the ideXlab platform.
-
cfd modeling of phase change and coke formation in petroleum refining heaters
Fuel Processing Technology, 2015Co-Authors: Luhong Zhang, Rongya Zhang, Yongli Sun, Bin Jiang, Mingfang LuoAbstract:A three dimensional computational fluid dynamics (CFD) model is developed to predict the phase change and reactions inside the tubes of fired furnace. The model is constructed within the Eulerian framework in which the liquid phase is treated as a continuous phase while gas and solid phases are both considered as dispersed phases, and all phases are treated as Interpenetrating Continuum having separate transport equations. The thermal cracking kinetic model is validated against experimental data. Calculations are performed using the commercial packages ANSYS CFX 14.0. The temperature distribution, flow field, liquid–gas phase separation, and coke formation are predicted for different severities of petroleum type and tube wall temperature. The information predicted by the CFD model can be utilized in the optimal design of industrial fired furnaces.
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
2014Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
Industrial & Engineering Chemistry Research, 2013Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays.
Luhong Zhang - One of the best experts on this subject based on the ideXlab platform.
-
hydrodynamics analysis of a folding sieve tray by computational fluid dynamics simulation
Journal of Engineering Thermophysics, 2018Co-Authors: W. Feng, Luhong Zhang, Xianghui XiaoAbstract:In this reported work, a new type of tray, a folding sieve tray (FST), consisting of duplicated perforated oblique planes folding at a specific angle was designed. A three-dimensional two-fluid CFD model was employed to predict the hydrodynamics performance of a 0.6 m FST at different folding angles (48° and 90°) and opening ratios (10.2%, 12.5%, and 15.0%), compared with a 0° unfolding-structure sieve tray (ST). The models used in this study were within the two-phase Eulerian framework to ensure that the gas and liquid phases were an Interpenetrating Continuum. To verify the reliability of the models, the simulation results were compared with experimental results and were found to be in good agreement, and the relative error was less than 10%. The backmixing, pressure drop, clear liquid height, froth height, entrainment and the details of the gas–liquid distributions on the tray were investigated. Better operational stability was found in FST that resulted from the better liquid distribution, a lower pressure drop across the tray, and a relatively smaller clear liquid height. It was shown that gas in the FST had a higher horizontal velocity near the holes to guide the liquid phase. About 90% of backmixing, 50% of clear liquid height, and 30%of wet tray pressure drop were reduced in the FST.
-
cfd modeling of phase change and coke formation in petroleum refining heaters
Fuel Processing Technology, 2015Co-Authors: Luhong Zhang, Rongya Zhang, Yongli Sun, Bin Jiang, Mingfang LuoAbstract:A three dimensional computational fluid dynamics (CFD) model is developed to predict the phase change and reactions inside the tubes of fired furnace. The model is constructed within the Eulerian framework in which the liquid phase is treated as a continuous phase while gas and solid phases are both considered as dispersed phases, and all phases are treated as Interpenetrating Continuum having separate transport equations. The thermal cracking kinetic model is validated against experimental data. Calculations are performed using the commercial packages ANSYS CFX 14.0. The temperature distribution, flow field, liquid–gas phase separation, and coke formation are predicted for different severities of petroleum type and tube wall temperature. The information predicted by the CFD model can be utilized in the optimal design of industrial fired furnaces.
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
2014Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
Industrial & Engineering Chemistry Research, 2013Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays.
Yongli Sun - One of the best experts on this subject based on the ideXlab platform.
-
cfd modeling of phase change and coke formation in petroleum refining heaters
Fuel Processing Technology, 2015Co-Authors: Luhong Zhang, Rongya Zhang, Yongli Sun, Bin Jiang, Mingfang LuoAbstract:A three dimensional computational fluid dynamics (CFD) model is developed to predict the phase change and reactions inside the tubes of fired furnace. The model is constructed within the Eulerian framework in which the liquid phase is treated as a continuous phase while gas and solid phases are both considered as dispersed phases, and all phases are treated as Interpenetrating Continuum having separate transport equations. The thermal cracking kinetic model is validated against experimental data. Calculations are performed using the commercial packages ANSYS CFX 14.0. The temperature distribution, flow field, liquid–gas phase separation, and coke formation are predicted for different severities of petroleum type and tube wall temperature. The information predicted by the CFD model can be utilized in the optimal design of industrial fired furnaces.
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
2014Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
Industrial & Engineering Chemistry Research, 2013Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays.
Na Yang - One of the best experts on this subject based on the ideXlab platform.
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
2014Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays
-
Computational Fluid Dynamics Modeling of Hydrodynamics of a New Type of Fixed Valve Tray
Industrial & Engineering Chemistry Research, 2013Co-Authors: Na Yang, Luhong Zhang, Yongli Sun, Bin JiangAbstract:A three-dimensional computational fluid dynamics (CFD) model was developed to predict the hydrodynamics of a new type of fixed valve tray. The model considered gas- and liquid-flow within the Eulerian framework in which both phases were treated as Interpenetrating Continuum having separate transport equations. Interphase momentum transfer term was employed for describing the interfacial forces between the two phases, and the related average gas hold-up was obtained via the regression equation from experiment data. Calculations were carried out using the commercial packages ANSYS CFX 12.0. Clear liquid height, gas hold-up, and gas and liquid velocity profiles were predicted for various combinations of weir height, gas, and liquid flow rates. The predicted clear liquid height was generally in good agreement with measurement. The information predicted by the CFD model can be used in the optimal design of industrial trays.
Getye Gesit - One of the best experts on this subject based on the ideXlab platform.
-
Sieve tray pressure drop by means of CFD modeling and simulation
Zede Journal, 2020Co-Authors: Getye GesitAbstract:Sieve trays must be designed to have and operated at acceptably low enough tray pressure drop. Both of these tasks (i.e., tray design and tray analysis) require method(s) for sieve tray pressure drop determination. So far, only empirical correlations have been used for sieve tray pressure drop estimation. However, the correlations are not based on actual mechanics of flow but are based on gross oversimplifications and empirical correlations– hence often have large errors and are not reliable. A reliable and accurate way for the pressure drop determination can be achieved by use of working computational fluid dynamics (CFD) modeling and simulation. With working CFD model provided, the CFD modeling and simulation is mechanistic and first principles based or fundamentals based. In this work, a CFD model is developed and used to model and simulate and predict sieve tray pressure drop. The model considers the three-dimensional twophase flow of gas (or vapour) and liquid in which each phase is treated as an Interpenetrating Continuum having separate transport equations. Interaction between the two phases occurs via interphase momentum transfer. For the CFD analysis, the commercial package CFX 17.0 of ANSYS was employed. Total and dry tray pressure drops are predicted for various combinations of gas and liquid flow rates. Predicted results are inacceptable and good agreement with experimental results. The objective of the work was developing CFD model for sieve tray pressure drop and studying and finding out the extent to which the CFD modeling and simulation can be used as a prediction and design tool and method for sieve tray pressure drop. From the results and the CFD model performance, it is concluded that the CFD model provided here is acceptably good for sieve tray pressure drop modeling and simulation and hence is acceptably good for tray design and analysis.
-
Sieve Tray Efficiency using CFD Modeling and Simulation
Zede Journal, 2013Co-Authors: Getye GesitAbstract:In this work, computational fluid dynamics (CFD) models are developed and used to predict sieve tray hydrodynamics and mass transfer. The models consider the three-dimensional two-phase flow of vapor (or gas) and liquid in which each phase is treated as an Interpenetrating Continuum having separate transport equations. Interaction between the two phases occurs via interphase momentum and species mass transfers. For the CFD analysis, the commercial package CFX 14 of ANSYS was employed. Clear liquid height and vapor phase Murphree point and tray efficiencies are predicted for ten stages each of two distillation columns for two binary fluid systems. Predicted results are in agreement with selected existing correlations that have been accepted to give reasonably accurate predictions. The objective of the work was studying the extent to which CFD modeling and simulation can be used as a prediction and design tool and method for sieve tray mass transfer and efficiency. It is concluded that CFD modeling and simulation can be used as a powerful tool and method for sieve mass transfer modeling and simulation and hence can be used as a very valuable tool and method for tray design and analysis. Keywords: Sieve Tray, Tray Efficiency, Tray Design and Analysis, CFD Modeling and Simulation, Mass Transfer
-
CFD modeling of flow patterns and hydraulics of commercial‐scale sieve trays
AIChE Journal, 2003Co-Authors: Getye Gesit, Krishnaswamy Nandakumar, Karl T. ChuangAbstract:A computational fluid dynamics (CFD) model was used to predict the flow patterns and hydraulics of a commercial-scale sieve tray. The model considers the 3-D two-phase flow of gas and liquid in which each phase is treated as an Interpenetrating Continuum having separate transport equations. Interaction between the two phases occurs via an interphase momentum transfer. For the CFD analysis, the commercial packages CFX5.4 and CFX4.4 of AEA Technology were employed. Velocity distributions, clear liquid height, froth height, and liquid holdup fraction in froth were predicted for various combinations of gas and liquid flow rates. Tray geometry and operating conditions were based on the experimental work that Solari and Bell carried out in a 1.22-m diameter air-water simulator in 1986 at Fractionation Research Inc. Predicted results were found to be in good agreement with the experimental data of these authors. The objective of the work was studying the extent to which CFD can be used as a prediction and design tool for industrial trays. The simulation results are such that CFD can be used as an invaluable tool in tray design and analysis.
