ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
A FINITE ELEMENT ANALYSIS OF HEAT TRANSFER IN SOLID WITH RADIATION AND ABLATION
摘要
A finite element approach is employed in the
analysis of one-dimensional heat transfer in
solids with variable thermal properties and
ablating boundary condition. The solid under consideration
is subjected to simultaneous thermal
radiation, concentrate heat flux and convection.
In the analysis, the effect of heat of ablation
is approximated by using a large heat capacity
over a small temperature range in the vicinity of
the melting temperature. To simulate the removal
of the melt, fictitious elements with zero
capacity and a large conductivity are employed
for the ablated material. Consideration has been
given to the ablation of a graphite-epoxy
composite which is subjected to a uniform heat
flux due to laser irradiation; the slab dissipated
heat by thermal radiation and forced convection
at one side and is insulated at the other
side. The present predicted surface recession and
the temperature distribution in the unmelted slab
are compared with the experimental data and a
finite difference solution available in the
literature.