TY - JFULL
AU - M. Akbari and S. Sadodin
PY - 2010/12/
TI - Numerical Investigation of Non Fourier Heat Conduction in a Semi-infinite Body due to a Moving Concentrated Heat Source Composed with Radiational Boundary Condition
T2 - International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering
SP - 1226
EP - 1234
EM - m_akbari_g@yahoo.com, s_sadodin@iust.ac.ir
VL - 4
SN - 1307-6892
UR - http://waset.org/publications/13081
PU - World Academy of Science, Engineering and Technology
NX - International Science Index 47, 2010
N2 - In this paper, the melting of a semi-infinite body as a
result of a moving laser beam has been studied. Because the Fourier
heat transfer equation at short times and large dimensions does not
have sufficient accuracy; a non-Fourier form of heat transfer
equation has been used. Due to the fact that the beam is moving in x
direction, the temperature distribution and the melting pool shape are
not asymmetric. As a result, the problem is a transient threedimensional
problem. Therefore, thermophysical properties such as
heat conductivity coefficient, density and heat capacity are functions
of temperature and material states. The enthalpy technique, used for
the solution of phase change problems, has been used in an explicit
finite volume form for the hyperbolic heat transfer equation. This
technique has been used to calculate the transient temperature
distribution in the semi-infinite body and the growth rate of the melt
pool. In order to validate the numerical results, comparisons were
made with experimental data. Finally, the results of this paper were
compared with similar problem that has used the Fourier theory. The
comparison shows the influence of infinite speed of heat propagation
in Fourier theory on the temperature distribution and the melt pool
size.
ER -