Simulation of Solid-Liquid Two-Phase Flow Inside and Outside the Abrasive Water Jet Nozzle

2007 ◽  
Vol 339 ◽  
pp. 453-457 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
X.Y. Lu ◽  
Yan Xia Feng
Keyword(s):  
Velocity Field ◽  
Two Phase Flow ◽  
Cone Angle ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Two Phase ◽  
Inner Surface ◽  
Jet Nozzle ◽  
Solid Liquid

Simulation of the velocity field of solid-liquid flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software(CFD). The velocity field of the flow in the abrasive water jet (AWJ) nozzle was obtained. The results indicate that the swirl is produced in the nozzle and the abrasives are all distributed along the inner surface of the nozzle. The velocity at the center of the outlet face is the highest, while it is smallest at the both edge. The dispersion of the flow is happened when it flows out of the nozzle, but the flow velocity away from the outlet at a distance of about 4 times of the outlet diameter changes little. The fillet diameter, the inner cone angle, the length of mixing tube of the nozzle greatly affect the field of two-phase flow. The velocity of outlet increases with an increase in the fillet diameter, the flow becomes ease when the cone angle decreases, the mixing tube hampers the two-phase flowing.

Simulation of Velocity Field of Two-Phase Flow for Gas and Liquid in the Abrasive Water Jet Nozzle

2006 ◽  
Vol 315-316 ◽  
pp. 150-153 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Yan Xia Feng ◽  
Hong Tao Zhu
Keyword(s):  
Velocity Field ◽  
Cone Angle ◽  
Water Jet ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Complex Velocity ◽  
Two Phase ◽  
Jet Nozzle ◽  
Cone Surface ◽  
Gas Liquid Flow

Simulation on velocity field of gas-liquid flow in the abrasive water jet nozzle was studied by the computed fluid dynamics (CFD) software, The complex velocity field of the flow in the abrasive water jet nozzle can be obtained by means of simulation. The study on the effect of the nozzle inner cone angle on the velocity field shows that the cone angle affects the whirlpool’s intension and position of the whirlpool in the nozzle of abrasive water jet (AWJ), and it also affects velocity ‘s magnitude and distribution of the velocity on the cone surface.

Two Domensional Simulation of Velocity Field of Two-Phase Flow for Gas and Solid in the Abrasive Air Jet Nozzle

2007 ◽  
Vol 359-360 ◽  
pp. 465-469
Author(s):  
Chuan Zhen Huang ◽  
Rong Guo Hou ◽  
Zeng Wen Liu ◽  
Quan Lai Li ◽  
Hong Tao Zhu
Keyword(s):  
Fluid Dynamics ◽  
Velocity Field ◽  
Velocity Distribution ◽  
Radial Direction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Nozzle Outlet ◽  
Two Phase ◽  
Air Jet ◽  
Jet Nozzle

Simulation on velocity field of gas-solid flow in the abrasive air jet nozzle was studied by the computed fluid dynamics(CFD) software. The velocity field of the two-phase flow in the abrasive air jet nozzle can be obtained by means of simulation. The effect of the nozzle diameter on the velocity field shows that the velocity field in the nozzle with a smaller diameter is more well-distributed. The velocity distribution along the nozzle axis and the radial direction of the nozzle outlet was also simulated.

Simulation of Gas-Solid-Liquid Three-Phase Flow Inside and Outside the Abrasive Water Jet Nozzle

2006 ◽  
Vol 532-533 ◽  
pp. 833-836 ◽  
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Hong Tao Zhu ◽  
Yan Xia Feng
Keyword(s):  
Water Jet ◽  
Border Zone ◽  
Phase Flow ◽  
Abrasive Water Jet ◽  
Three Phase ◽  
Three Phase Flow ◽  
Jet Nozzle ◽  
Velocity Changes ◽  
Solid Liquid ◽  
Model Water

Simulation of the velocity field of gas-solid-liquid three-phase flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software (CFD). The complicated velocity field of the flow in the abrasive water jet (AWJ) nozzle and the abrasive track in the nozzle were obtained. In the course of the simulation, the inter-phase drag exchange coefficient model uses Gidaspow model (gas-solid), Wen-yu model (water-solid), Schiller-Naumann model (water-gas) respectively. The simulation results indicate that the swirl is produced in the nozzle and the abrasives are accelerated and moved around the swirl, and they are all distributed along the inner surface of the nozzle, the gas is mostly distributed in the center of swirl. The dispersion of the flow happens when it flows out of the nozzle, it can be divided into three zones, that is core zone, middle zone and border zone. At the core zone the velocity changes little while the velocity changes greatly at the middle zone, the velocity fluctuates greatly at the border zone.

2D Simulation of the Gas-Solid Two Phase Flow inside the Abrasive Jet (AJ) Nozzle

2008 ◽  
Vol 53-54 ◽  
pp. 369-373
Author(s):  
Rong Guo Hou ◽  
Chuan Zhen Huang ◽  
Y.S. Feng ◽  
Y.Y. Liu
Keyword(s):  
Flow Field ◽  
Two Phase Flow ◽  
Cone Angle ◽  
Multiphase Model ◽  
Phase Flow ◽  
Fatigue Wear ◽  
Two Phase ◽  
2D Simulation ◽  
Jet Nozzle ◽  
Simulation Results

The simulation of the gas-solid two phase flow inside the abrasive jet nozzle is studied by the computed dynamic software (CFD)-FLUENT, the velocity field of the two phase flow and the trajectory of the abrasive inside the nozzle are obtained. The Eulerian multiphase model and the DPM model have been used to compute the two-phase flow field. The simulation results express that the velocity of the jet is slow at the inlet, while it will be increased with the area of the section decreasing, the cone angle of the nozzle affects the flow field very much, the flow has low turbulence and the gradient of the velocity is small when the cone angle is small, while the velocity of the flow increased rapidly and the gradient of the velocity is big when the cone angle increasing. The simulation results also express that the arc radius affects the flow field greatly, the flow will move more smoothly when the arc radius is large. The pressure field of the wall expresses that the nozzle will wear rapidly at the corner of the nozzle, the reason is that the pressure is big or changed greatly, the fatigue wear and the blast wear will happen at those place.

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