Numerical Simulation on the Temperature Field of Water-Jet Guided Laser Micromachining

2009 ◽  
Vol 69-70 ◽  
pp. 333-337 ◽  
Author(s):  
Li Jun Yang ◽  
M.L. Wang ◽  
Yang Wang ◽  
J. Tang ◽  
Yan Bin Chen
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Numerical Model ◽  
Theoretical Foundation ◽  
Laser Micromachining ◽  
Water Jet ◽  
Laser Machining ◽  
New Development ◽  
Set Up ◽  
Development Orientation

Water-jet guided laser micromachining is the new development orientation of laser machining. This paper set up the numerical model on the action between the water-jet guided laser and the material. By using the software ANSYS, simulated the processing of the water-jet guided laser micromachining. This paper gave the investigation on the machining laws and the distributing of temperature fielding in processing of water-jet guided laser micromachining. And the results of the correlative experiment prove the model aright. The result provided the theoretical foundation for the next research on the water-jet guided laser machining.

The Numerical Simulation of the Water Jet in Hydroentanglement

2011 ◽  
Vol 189-193 ◽  
pp. 2181-2184
Author(s):  
Heng Zhang ◽  
Xiao Ming Qian ◽  
Zhi Min Lu ◽  
Yuan Bai
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Multiphase Flow ◽  
Flow Model ◽  
Two Phase Flow ◽  
Water Jet ◽  
Phase Flow ◽  
Governing Equations ◽  
Two Phase ◽  
Set Up

The functions of hydroentangled nonwovens are determined by the degree of the fiber entanglement, which depend mainly on parameters of the water jet. According to the spun lacing technology, this paper set up the numerical model based on the simplified water jetting model, establishing the governing equations, and the blended two-phase flow as the multiphase flow model. This paper simulation the water needle after the water jetting from the water needle plate in the different pressure (100bar, 60bar, 45bar, 35bar).

Numerical and Experimental Research on Water-Jet Guided Laser Micromachining

2009 ◽  
Vol 626-627 ◽  
pp. 297-302
Author(s):  
Li Jun Yang ◽  
Mao Lu Wang ◽  
Yang Wang ◽  
J. Tang ◽  
Yan Bin Chen
Keyword(s):  
Thermal Effects ◽  
Laser Micromachining ◽  
Paper Analysis ◽  
Water Jet ◽  
Laser Machining ◽  
Action Mechanism ◽  
New Development ◽  
Simulation Results ◽  
Plasma Shock Wave ◽  
Plasma Shock

Water-jet guided laser micromachining is the new development of laser machining. This paper analysis the action mechanism of the plasma shock wave and hollow erode effects in water-jet guided laser machining processing, on the base of the thermal effects of the laser and water-jet. And the numerical model on the action effects between the water-jet guided laser and the material was founded. Using the software ANSYS, the processing of the water-jet guided laser micromachining was simulated. This paper gave the investigation on the distributing of temperature field in processing of water-jet guided laser micromachining. And the results of the correlative experiment correspond with the simulation results.

scholarly journals Study on the Influence of Surface Temperature Field of Aluminum Alloy Etched by Laser Water Jet Composite Machining

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3206
Author(s):  
Xuehui Chen ◽  
Xin Xu ◽  
Wei Liu ◽  
Lei Huang ◽  
Hao Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Surface Temperature ◽  
Process Parameters ◽  
Water Jet ◽  
Laser Machining ◽  
Material Surface ◽  
Laser Etching ◽  
Surface Temperature Field

This paper studies the compound effect of liquid medium and laser on the workpiece and analyses the law of material surface temperature change during the processing. Taking 7075-T6 aluminum alloy as the research object, the surface temperature field of aluminum alloy processed using water-jet-assisted laser machining under different process parameters was simulated using finite element software. In addition, the temperature field of the material surface was detected in real-time using the self-built water-jet-assisted laser machining temperature field detection system, and the processing results were observed and verified using an optical microscope, scanning electron microscope, and energy spectrum analyzer. The results show that when the water jet inflow angle is 45°, the heat-affected area of the material surface is the smallest, and the cooling effect of the temperature field of the material surface is better. Considering the liquidus melting point of 7075 aluminum alloys, it is concluded that the processing effect is better when the water jet velocity is 14 m·s−1, the laser power is 100 W, and the laser scanning speed is 1.2 mm·s−1. At this time, the quality of the tank is relatively good, there are no cracks in the bottom of the tank, and there is less slag accumulation. Compared with anhydrous laser etching, water-jet-assisted laser etching can reduce the problems of micro-cracks, molten slag, and the formation of a recast layer in laser etching and improve the quality of the workpiece, and the composition of the bottom slag does not change. This study provides theoretical guidance and application support for the selection and optimization of process parameters for water-jet-assisted laser etching of aluminum alloy and further enriches the heat transfer mechanism of multi-field coupling in the process of water-jet-assisted laser machining.

Numerical Simulation Analysis of the Groundwater’ Temperature Field in the Concentration Area of the Water Source Heat Pump Engineering

2012 ◽  
Vol 174-177 ◽  
pp. 3027-3030
Author(s):  
Wei Wei ◽  
Ming Zhong Wang ◽  
Jun Pan
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Numerical Model ◽  
Heat Pump ◽  
Simulation Analysis ◽  
Water Source ◽  
Groundwater Temperature ◽  
Change Trend

In order to avoid the heat transfixion among users in the concentration area of the water source heat pump, a suitable layout of pumps for drawing and recharging wells is required. Finite element method is adopted to establish the numerical model of groundwater temperature to predict the change trend of water temperature. The results of the simulation indicate that the groundwater temperature change from 6.3 to 14.2 °C in winter, and from 11.5 to 21.2 °C in summer. These results meet the requirements of the drawing and recharging water in the water source heat pump engineering and are able to avoid the heat transfixion among users. The effect of drawing and recharging water in the water source heat pump engineering to the changes of the groundwater’s temperature field can be analyzed quantitatively through establishing the proper numerical simulation which provides a reference to scientifically design the layout of pumps for drawing and recharging water.

Numerical simulation of water jet–guided laser micromachining of CFRP

2020 ◽  
Vol 25 ◽  
pp. 101456
Author(s):  
Yinuo Zhang ◽  
Hongchao Qiao ◽  
Jibin Zhao ◽  
Zhihe Cao ◽  
Yongfei Yu
Keyword(s):  
Numerical Simulation ◽  
Laser Micromachining ◽  
Water Jet

Experimental and Numerical Investigations of Steel Profiles with Intumescent Coating Adjacent to Space-Enclosing Elements in Fire

2015 ◽  
Vol 6 (4) ◽  
pp. 237-246 ◽  
Author(s):  
Peter Kraus ◽  
Martin Mensinger ◽  
Florian Tabeling ◽  
Peter Schaumann
Keyword(s):  
Temperature Field ◽  
Numerical Model ◽  
Fire Protection ◽  
Experimental Investigations ◽  
Expansion Process ◽  
Intumescent Coating ◽  
Numerical Investigations ◽  
Steel Members ◽  
New Development ◽  
In Fire

In this paper, the research program “Optimized use of intumescent coating systems on steel members” is presented. The aim of the project is to quantify the influence of space-enclosing elements on the thermal behavior of supporting steel members. Those elements partially result in a restrained expansion of the fire protection system. Experimental investigations on coated beams and columns directly connected to space-enclosing elements are presented. Additionally, numerical simulations are performed for temperature field calculations of steel elements with intumescent coating. As a new development, the numerical model takes into account the expansion process of the intumescent coating.

Characteristics Analysis of Noncontact Spinning Mechanism with Numerical Simulation

2011 ◽  
Vol 308-310 ◽  
pp. 2146-2151
Author(s):  
Feng Sun ◽  
Jun Jie Jin ◽  
Koichi Oka
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Remanent Magnetization ◽  
Vertical Direction ◽  
Magnetic Suspension ◽  
Characteristics Analysis ◽  
Magnetic Suspension System ◽  
Parallel Configuration ◽  
Set Up ◽  
Magnetic Poles

This paper analyzes the spinning characteristics of a noncontact spinning mechanism with numerical simulation. In this mechanism, when the suspended object is stably levitated in the vertical direction by a magnetic suspension system, the disk magnets spin the suspended object in the horizontal direction by means of the remanent magnetization on the surface of the suspended object. The disk magnets are arranged around the levitated object, and the magnetic poles are arranged in a parallel configuration. In this paper, the mechanism is introduced, and the remanent magnetization on the surface of the suspended object is examined using a gauss meter. A numerical model is set up, and the spinning characteristics are analyzed with a step input and its velocity in steady states conditions using different numbers of magnets.

Numerical Simulation on Local Ventilation in the Mine Tunnel

2012 ◽  
Vol 446-449 ◽  
pp. 2879-2883
Author(s):  
E Dong ◽  
Long Guan
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Temperature Field ◽  
Velocity Field ◽  
Working Environment ◽  
Wind Speeds ◽  
Local Ventilation ◽  
Set Up ◽  
Lower Temperature ◽  
The Mathematical Model

Based on the characteristics of the mine tunnel and turbulence equation, the mathematical model of the mine tunnel of the ventilation flow is set up .Using the software simulates and analyzes the distribution of the velocity field of airflow and temperature field under different wind speeds in the mine tunnel. The result shows that the inlet airflow at the speed 4.5m/s is more stable and lower temperature to improve the working environment on the roadway.

Validation of SPH-FE Numerical Modeling of the Interaction between a High-Speed Water Jet and a PMMA Target by CEL Model and Experimental Study

2020 ◽  
Vol 21 (3-4) ◽  
pp. 227-238
Author(s):  
I. Ben Belgacem ◽  
L. Cheikh ◽  
E.M. Barhoumi ◽  
W. Khan ◽  
W. Ben Salem
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
High Speed ◽  
Water Jet ◽  
Fe Method ◽  
Sph Method ◽  
Impact Surface ◽  
Particle Hydrodynamics ◽  
Spherical Head ◽  
The Impact

AbstractIn this paper, we present a numerical simulation of a round impacting jet using coupled Smoothed Particle Hydrodynamics (SPH) and Finite Element (FE) methods. Numerical results are compared with the results of another simulation carried out by the CEL (Coupled Eulerian-Lagrangian) method. A water jet with a spherical head was used at an initial speed of 570 m/s to impact a flat plate made of Polymethyl-Methacrylate (PMMA). To model the entire process, the SPH method was used to model the water jet and the FE method for the PMMA structure. The distribution of the pressure on the impact surface and the resulting deformation of the structure were discussed. A Numerical model was developed using ABAQUS/Explicit version 6.14. Results of the coupled SPH-FE simulation were further validated. It is demonstrated that the CEL method presents smoother curves compared to the SPH method. These comparisons serve not only to validate the numerical simulation but also to give guidance in formulating the SPH-FEM numerical model.

The Characteristics of MEMS Based Seismic Sensors Using the Electrochemical Approach

2013 ◽  
Vol 562-565 ◽  
pp. 486-489 ◽  
Author(s):  
Yun Jie Fan ◽  
Jun Bo Wang ◽  
Tao Deng ◽  
De Yong Chen ◽  
Wen Tao He
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Vibration Test ◽  
Test Results ◽  
Seismic Sensors ◽  
Electrochemical Approach ◽  
The Difference ◽  
Set Up

The characteristics of MEMS based electrochemical seismic sensors (EC seismic sensors) are presented in this paper. A numerical model is set up, and a series of vibration test is established. The numerical simulation and vibration test results are illustrated and the difference between them is discussed.

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