Coupling Eulerian-Lagrangian method of air-particle two-phase flow with population balance equations to simulate the evolution of vehicle exhaust plume

2018 ◽  
Vol 88 (3) ◽  
pp. 117-140 ◽  
Author(s):  
Yuanping He ◽  
Zhaolin Gu ◽  
Junwei Su ◽  
Chungang Chen ◽  
Mingxu Zhang ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Population Balance ◽  
Lagrangian Method ◽  
Phase Flow ◽  
Vehicle Exhaust ◽  
Balance Equations ◽  
Two Phase ◽  
Population Balance Equations ◽  
Exhaust Plume

A Combined Eulerian and Lagrangian Method for Prediction of Evaporating Sprays

2002 ◽  
Vol 124 (3) ◽  
pp. 481-488 ◽  
Author(s):  
M. Burger ◽  
G. Klose ◽  
G. Rottenkolber ◽  
R. Schmehl ◽  
D. Giebert ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Initial Conditions ◽  
Three Dimensional ◽  
Lagrangian Method ◽  
Phase Flow ◽  
Two Phase Flows ◽  
Two Phase ◽  
Lagrangian Methods ◽  
Eulerian Method ◽  
Lagrangian Modeling

Polydisperse sprays in complex three-dimensional flow systems are important in many technical applications. Numerical descriptions of sprays are used to achieve a fast and accurate prediction of complex two-phase flows. The Eulerian and Lagrangian methods are two essentially different approaches for the modeling of disperse two-phase flows. Both methods have been implemented into the same computational fluid dynamics package which is based on a three-dimensional body-fitted finite volume method. Considering sprays represented by a small number of droplet starting conditions, the Eulerian method is clearly superior in terms of computational efficiency. However, with respect to complex polydisperse sprays, the Lagrangian technique gives a higher accuracy. In addition, Lagrangian modeling of secondary effects such as spray-wall interaction enhances the physical description of the two-phase flow. Therefore, in the present approach the Eulerian and the Lagrangian methods have been combined in a hybrid method. The Eulerian method is used to determine a preliminary solution of the two-phase flow field. Subsequently, the Lagrangian method is employed to improve the accuracy of the first solution using detailed sets of initial conditions. Consequently, this combined approach improves the overall convergence behavior of the simulation. In the final section, the advantages of each method are discussed when predicting an evaporating spray in an intake manifold of an internal combustion engine.

Predicting Compositional Two-Phase Flow Behavior in Pipelines

1986 ◽  
Vol 108 (3) ◽  
pp. 207-210 ◽  
Author(s):  
H. Furukawa ◽  
O. Shoham ◽  
J. P. Brill
Keyword(s):  
Mass Transfer ◽  
Computational Algorithm ◽  
Two Phase Flow ◽  
Flow Behavior ◽  
Phase Flow ◽  
Temperature Profiles ◽  
Balance Equations ◽  
Two Phase ◽  
Liquid Phases ◽  
Retrograde Condensation

A computational algorithm for predicting pressure and temperature profiles for compositional two-phase flow in pipelines has been developed. The algorithm is based on the coupling of the momentum and energy balance equations and the phase behavior of the flowing fluids. Mass transfer between the gas and the liquid phases is treated rigorously through flash calculations, making the algorithm capable of handling retrograde condensation. Temperatures can be predicted by applying the enthalpy balance equation iteratively. However, it was found that the explicit Coutler and Bardon analytical solution for the temperature profile yields nearly identical results for horizontal and near horizontal flow.

scholarly journals Numerical Simulation of Liquid-Fueled Detonations by an Eulerian–Lagrangian Model

2012 ◽  
Vol 13 (2) ◽  
Author(s):  
Hua Shen ◽  
Gang Wang ◽  
Kaixin Liu ◽  
Deliang Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Model ◽  
Two Phase Flow ◽  
Gaseous Mixture ◽  
Space Time ◽  
Lagrangian Method ◽  
Lagrangian Model ◽  
Phase Flow ◽  
Two Phase ◽  
Eulerian Method

AbstractIn this paper, an Eulerian–Lagrangian two-phase flow model for liquid-fueled detonations is constructed. The gaseous mixture is described by an Eulerian method, and liquid particles in gaseous mixture are traced by a Lagrangian method. An improved space-time conservation element and solution element (CE/SE) scheme is applied to the simulations of detonations in liquid C

A Combined Eulerian and Lagrangian Method for Prediction of Evaporating Sprays

2001 ◽  
Author(s):  
M. Burger ◽  
G. Klose ◽  
G. Rottenkolber ◽  
R. Schmehl ◽  
D. Giebert ◽  
...  
Keyword(s):  
Two Phase Flow ◽  
Initial Conditions ◽  
Lagrangian Method ◽  
Phase Flow ◽  
Two Phase Flows ◽  
Two Phase ◽  
Ic Engine ◽  
Lagrangian Methods ◽  
Eulerian Method ◽  
Lagrangian Modeling

Polydisperse sprays in complex three dimensional flow systems are important in many technical applications. Numerical descriptions of sprays are used to achieve a fast and accurate prediction of complex two-phase flows. The Eulerian and Lagrangian methods are two essentially different approaches for the modeling of disperse two-phase flows. Both methods have been implemented into the same CFD - package which is based on a 3D body-fitted Finite Volume method. Considering sprays represented by a small number of droplet starting conditions, the Eulerian method is clearly superior in terms of computational efficiency. However, with respect to complex polydisperse sprays, the Lagrangian technique gives a higher accuracy. In addition, Lagrangian modeling of secondary effects such as spray-wall interaction enhances the physical description of the two-phase flow. Therefore, in the present approach the Eulerian and the Lagrangian methods have been combined in a hybrid method. The Eulerian method is used to determine a preliminary solution of the two-phase flow field. Subsequently, the Lagrangian method is employed to improve the accuracy of the first solution using detailed sets of initial conditions. Consequently, this combined approach improves the overall convergence behavior of the simulation. In the final section, the advantages of each method are discussed when predicting an evaporating spray in an intake manifold of an IC-engine.

Three-dimensional mathematical modeling of dispersed two-phase flow using class method of population balance in bubble columns

2008 ◽  
Vol 32 (12) ◽  
pp. 3224-3237 ◽  
Author(s):  
Rachid Bannari ◽  
Fouzi Kerdouss ◽  
Brahim Selma ◽  
Abdelfettah Bannari ◽  
Pierre Proulx
Keyword(s):  
Mathematical Modeling ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Population Balance ◽  
Bubble Columns ◽  
Phase Flow ◽  
Two Phase

Numerical Simulation of Solid Propellant Rocket Exhaust Plume Considering Two-Phase Flow Effects

2015 ◽  
Vol 798 ◽  
pp. 185-189
Author(s):  
Yan Jie Ma ◽  
Fu Ting Bao ◽  
Hao Xu ◽  
Lin Sun
Keyword(s):  
Solid Propellant ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Exhaust Plume ◽  
Solid Propellant Rocket ◽  
Flight Height ◽  
Flow Effects ◽  
Rocket Exhaust ◽  
Propellant Rocket

Two-phase flow can have significance influence on exhaust plume of solid propellant, as well as the infrared radiation of the rocket. To show this influence, flow field of solid propellant rocket exhaust plume is simulated on different working conditions, where two-phase flow is involved using the DPM method. Comparing the flow filed results with or without two-phase flow considered shows that the existence of the condensed particles can decreases the velocity of the plume and increases the temperature. The influences of the flight height and Mach number on exhaust plume are also discussed.

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