scholarly journals Kinetic-based Multiphase Flow Simulation

2020 ◽  
pp. 1-1 ◽  
Author(s):  
Wei Li ◽  
Daoming Liu ◽  
Mathieu Desbrun ◽  
Jin Huang ◽  
Xiaopei Liu
Keyword(s):  
Multiphase Flow ◽  
Flow Simulation

scholarly journals Enhanced discrete phase model for multiphase flow simulation of blood flow with high shear stress

2021 ◽  
Vol 104 (1) ◽  
pp. 003685042110080
Author(s):  
Zheqin Yu ◽  
Jianping Tan ◽  
Shuai Wang
Keyword(s):  
Blood Flow ◽  
Shear Stress ◽  
Multiphase Flow ◽  
Experimental Verification ◽  
Flow Simulation ◽  
Turbulence Models ◽  
Phase Model ◽  
Force Model ◽  
Discrete Phase Model ◽  
Discrete Phase

Shear stress is often present in the blood flow within blood-contacting devices, which is the leading cause of hemolysis. However, the simulation method for blood flow with shear stress is still not perfect, especially the multiphase flow model and experimental verification. In this regard, this study proposes an enhanced discrete phase model for multiphase flow simulation of blood flow with shear stress. This simulation is based on the discrete phase model (DPM). According to the multiphase flow characteristics of blood, a virtual mass force model and a pressure gradient influence model are added to the calculation of cell particle motion. In the experimental verification, nozzle models were designed to simulate the flow with shear stress, varying the degree of shear stress through different nozzle sizes. The microscopic flow was measured by the Particle Image Velocimetry (PIV) experimental method. The comparison of the turbulence models and the verification of the simulation accuracy were carried out based on the experimental results. The result demonstrates that the simulation effect of the SST k- ω model is better than other standard turbulence models. Accuracy analysis proves that the simulation results are accurate and can capture the movement of cell-level particles in the flow with shear stress. The results of the research are conducive to obtaining accurate and comprehensive analysis results in the equipment development phase.

Recent progress in multiphase flow simulation through multiphase pumps

Heat Transfer ◽  
2020 ◽  
Vol 49 (5) ◽  
pp. 2849-2867
Author(s):  
Deepak Meerakaviyad ◽  
Tony Keville ◽  
Atma Prakash ◽  
Abdullah Sajid ◽  
Faik Hamad
Keyword(s):  
Multiphase Flow ◽  
Recent Progress ◽  
Flow Simulation

Multiphase flow simulation in injection pultrusion with variable properties

2020 ◽  
Vol 35 (2) ◽  
pp. 152-162 ◽  
Author(s):  
Fausto Tucci ◽  
Renato Bezerra ◽  
Felice Rubino ◽  
Pierpaolo Carlone
Keyword(s):  
Multiphase Flow ◽  
Flow Simulation ◽  
Variable Properties

scholarly journals Numerical simulation of multiphase flow in ventilation mill and channel with louvers and centrifugal separator

2011 ◽  
Vol 15 (3) ◽  
pp. 677-689 ◽  
Author(s):  
Mirko Kozic ◽  
Slavica Ristic ◽  
Mirjana Puharic ◽  
Boris Katavic
Keyword(s):  
Multiphase Flow ◽  
Numerical Simulations ◽  
Volume Fraction ◽  
Complex Geometry ◽  
Mixture Distribution ◽  
Flow Simulation ◽  
Centrifugal Separator ◽  
Discrete Phase Model ◽  
Discrete Phase ◽  
Lagrange Approach

This paper presents the results of numerical flow simulation in ventilation mill of Kostolac B power plant, where louvers and centrifugal separator with adjustable blade angle are used. Numerical simulations of multiphase flow were performed using the Euler-Euler and Euler-Lagrange approach of ANSYS FLUENT software package. The results of numerical simulations are compared with measurements in the mill for both types of separators. Due to very complex geometry and large number of the grid cells, convergent solution with the Eulerian model could not be obtained. For this reason the mixture model was employed resulting in very good agreement with measurements, concerning the gas mixture distribution and velocity at the main and secondary burners. There was large difference between the numerical results and measurements for the pulverized coal distribution at the burners. Taking into consideration that we analyzed dilute mixture with very low volume fraction of the coal, the only choice was the Euler-Lagrange approach, i.e. discrete phase model limited to volume fraction of the discrete phase less than 10-12%. Obtained distributions of the coal at the burners agree well for both types of separators.

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