Study on Heat Transfer Model of 2024 Aluminum Alloy under Static Magnetic Field

2011 ◽  
Vol 366 ◽  
pp. 229-233
Author(s):  
Chang Gui Cheng ◽  
Le Yu ◽  
Wen Cheng Wan ◽  
Zhong Tian Liu
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Aluminum Alloy ◽  
Static Magnetic Field ◽  
Transfer Problem ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Measured Temperature ◽  
2024 Aluminum Alloy ◽  
Magnetic Filed

The paper has established a two-dimensional non-steady-state heat transfer model for 2024 aluminum alloy solidification process under the static magnetic field. According to the measured temperature and the inverse heat transfer problem, the boundary conditions of model have been determined, the results show that the solidification rate and heat flux acting on the ingot surface increase with increasing of the static magnetic filed strength; when the static magnetic filed strength become stronger, the isotherm location will move towards the liquid pool center, and the temperature gradient in the liquid metal pool will increase.

Effect of Static Magnetic Field on 2024 Aluminum Alloy Solidification Behavior

2011 ◽  
Vol 225-226 ◽  
pp. 701-705
Author(s):  
Chang Gui Cheng ◽  
Le Yu ◽  
Wen Cheng Wan ◽  
Zhong Tian Liu ◽  
Yan Jin
Keyword(s):  
Magnetic Field ◽  
Aluminum Alloy ◽  
Static Magnetic Field ◽  
Solidification Rate ◽  
Solidification Structure ◽  
Peltier Effect ◽  
Magnetic Flux Density ◽  
Solidification Behavior ◽  
2024 Aluminum Alloy ◽  
Alloy Solidification

With the methods of macrostructure observation and temperature measurement, the paper has studied the influence rules of static magnetic field on 2024 aluminum alloy solidification structure and solidification rate. The conclusions can be concluded as follows: the static magnetic field can inhibit the growth of columnar crystals and promote the growth of equiaxed crystals; when the magnetic flux density is increased, the grain refining effect is better, the solidification rate of 2024 aluminum alloy increases remarkably, and the full solidification time is shorter; the reasons of grain refinement may be that the thermo-electromagnetic convection effect related to Peltier effect is stronger than electromagnetic braking effect, which can enhance the heat transfer and fluid flow in the solidification front, and that undercooling temperature is enlarged.

MICROSTRUCTURAL ANALYSIS THROUGH TRIDIMENSIONAL INVERSE HEAT TRANSFER MODEL IN GTA ALUMINUM ALLOY WELDING

2015 ◽  
Author(s):  
Elisan dos Santos Magalhães ◽  
Edmilson Otoni Correa ◽  
Ana Lúcia Fernandes de Lima E Silva ◽  
Sandro Metrevelle Marcondes Lima E Silva
Keyword(s):  
Heat Transfer ◽  
Aluminum Alloy ◽  
Microstructural Analysis ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Inverse Heat Transfer

Inverse Heat Transfer Solution of the Heat Flux Due to Induction Heating

2004 ◽  
Vol 127 (3) ◽  
pp. 555-563 ◽  
Author(s):  
Jie Luo ◽  
Albert J. Shih
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Finite Difference ◽  
Cross Section ◽  
Induction Heating ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Measured Temperature ◽  
Induction Heat ◽  
Inverse Heat Transfer

The explicit finite difference formulation of an inverse heat transfer model to calculate the heat flux generated by induction is developed. The experimentally measured temperature data are used as the input for the inverse heat transfer model. This model is particularly suitable for a workpiece with low cross section Biot number. Induction heating experiments are carried out using a carbon steel rod. The finite difference method and thermocouple temperature measurements are applied to estimate the induction heat flux and workpiece temperature. Compared to measured temperatures, the accuracy and limitation of proposed method is demonstrated. The effect of nonuniform temperature distribution, particularly in the heating region during the induction heating, is studied. Analysis results validate the assumption to use the uniform temperature in a cross section for the inverse heat transfer solution of induction heat flux. Sensitivity to the grid spacing, thermocouple location, and thermophysical properties are also studied.

Theoretical Post-Dryout Heat Transfer Model

2018 ◽  
Vol 1 (1) ◽  
pp. 142-150
Author(s):  
Murat Tunc ◽  
Ayse Nur Esen ◽  
Doruk Sen ◽  
Ahmet Karakas
Keyword(s):  
Heat Transfer ◽  
Droplet Diameter ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Operating Pressure ◽  
Vertical Pipe ◽  
Two Phase ◽  
Experimental Values ◽  
Reactor Operating ◽  
Coolant System

A theoretical post-dryout heat transfer model is developed for two-phase dispersed flow, one-dimensional vertical pipe in a post-CHF regime. Because of the presence of average droplet diameter lower bound in a two-phase sparse flow. Droplet diameter is also calculated. Obtained results are compared with experimental values. Experimental data is used two-phase flow steam-water in VVER-1200, reactor coolant system, reactor operating pressure is 16.2 MPa. On heater rod surface, dryout was detected as a result of jumping increase of the heater rod surface temperature. Results obtained display lower droplet dimensions than the experimentally obtained values.

An Engine Heat Transfer Model for Comprehensive Thermal Simulations

2006 ◽  
Author(s):  
Filip Kitanoski ◽  
Wolfgang Puntigam ◽  
Martin Kozek ◽  
Josef Hager
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Thermal Simulations

Developing a CFD heat transfer model for applying high expansion foam in an LNG spill

2021 ◽  
Vol 71 ◽  
pp. 104456
Author(s):  
Zhuoran Zhang ◽  
Pratik Krishnan ◽  
Zeren Jiao ◽  
M. Sam Mannan ◽  
Qingsheng Wang
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Expansion Foam
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