کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
669135 1458770 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inverse estimation of front surface temperature of a plate with laser heating and convection–radiation cooling
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Inverse estimation of front surface temperature of a plate with laser heating and convection–radiation cooling
چکیده انگلیسی

The conjugate gradient method (CGM) is an efficient iterative regularization technique for solution of the inverse heat conduction problem (IHCP). However, most of the existing CGM schemes deal with linear boundary conditions and constant thermophysical properties. Little attention has been paid to formulate the CGM with radiation boundary condition and temperature-dependent thermophysical properties. In this study, a nonlinear CGM scheme is formulated to recover the front surface heating condition of a 3-D object, based on the temperature measurements at back surface. The 3-D object is subjected to a high-intensity Gaussian laser beam heating on the front surface and a combined radiation and convection boundary condition on the back surface. The derivations of the direct problem, adjoint problem and sensitivity problem are presented in detail. The results are presented for two materials and excellent agreement between the inverse and exact solutions are demonstrated.


► A nonlinear conjugate gradient method (CGM) is employed to solve 3-D inverse heat conduction.
► A Gaussian laser beam heats the front and the back surface is cooled by radiation and convection.
► The derivations of the direct problem, adjoint problem and sensitivity problem are presented in detail.
► Excellent agreement between the inverse and exact solutions are demonstrated for two metals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 52, February 2012, Pages 22–30
نویسندگان
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