1.2.3.4.5.6.7.

©

Laser Pulse Heating Of Steel Surface: Consideration Of Phase-

Change

Process

Bin-Mansoor, S; Yilbas, BS

TAYLOR FRANCIS INC, NUMERICAL HEAT TRANSFER PART A-APPLICATIONS;

pp: 787-807; Vol: 50

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

Laser pulse heating and the phase-change process taking place in the region irradiated

by a laser beam are considered. A numerical method is employed to predict

temperature field and recessing velocities of evaporating and melting surfaces. An

experiment is conducted to compare the cavity size obtained from experiment with the

prediction. The prediction of the recession velocity of the evaporating surface is

compared with the results of a one-dimensional closed-form solution. It is found that

the mushy zones at the solid-liquid and liquid-vapor interfaces are visible at some

depth below the irradiated surface. The recession velocity of the evaporating front

velocity follows almost the temporal variation of the laser heating pulse; moreover,

recession velocity of the solid-liquid interface is higher than that corresponding to the

liquid-vapor interface. The cavity shape predicted from the present simulation agrees

well with experiment. In addition, the prediction of the recession velocity of the

evaporating surface agrees well with the closed-form solutions.

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For pre-prints please write to: bysilbas@kfupm.edu.sa

Copyright: King Fahd University of Petroleum & Minerals;http://www.kfupm.edu.sa